Red Robin Happy Hour

Red Robin, located at the Irvine Spectrum has a happy hour every weeknight Mon-Friday twice a night. The first is from 3 to 6pm and the second is 8pm to close (which is normally 10pm). Also happy hour is in the bar area only. Domestic drafts are $2.50 (which only includes Coors and Bud Light) and premium drafts are $3.50 a pint. Including Newcastle, Fat Tire, House Hefeweizen and Sam Adams seasonal brew.
Appetizer specials start at $3, which include chips and salsa or a pound of french fries. $5 appetizers include the House nachos, and $7 items include items such as the "Just-In" Quesadilla. From the experience at my table, I would only recommend the pound of french fries for the price.
For me, the only thing that really stood out about this happy hour is the fact that it takes place in between the early (3 to 6pm) and late night (10pm to close) standard hh times. If you happen to be looking for deals in between the hours of 8 and 10 then this is a good happy hour to hit up, otherwise its not really worth going out of your way for.

Chaparosa Grill HH

Chaparosa Grill located in The District at Tustin Legacy, is not really noticeable at first glance. However, they have an afternoon happy hour from 3 to 7pm Mon-Friday that has a few reasonably good deals. For example, their appetizers include the Happy Hour burger ($5), which consists of a hamburger and fries. A good price for a restaurant for an entire meal. However, it is a little on the smaller portion side.
Domestic beer bottles are priced at $2.75 each. And, imports including Red Stripe are priced at $3.75.
Other appetizers include the Jambalaya ($6.50) and Asian nachos ($4.50, pictured). The Jambalaya wasn't that flavorful according to those that ordered it at the table. The Asian nachos are made up of Wonton skins, wasabi, teriyaki sauce, cheese and chicken. They weren't anything special though, I'm personally not a fan of wasabi on my nachos.
Overall, the happy hour at Chaparosa Grill isn't anything special.

The Daily Dose Happy Hour

The Daily Dose Sports Bar is located in the same plaza off of Jamboree and Michelson that CPK and Mizuki are both found in. They have late night happy hour specials 7 nights a week. The night that we chose to go was on Sunday night. Where they have $3 domestics and $4 imports. Their food is not on special however. But their prices aren't bad either. Note: Due to this being a bar, only 21 and older are allowed inside the entire venue.
Those at my table ordered Amstel and Fat Tire beers that came to $4 each for bottles. And food that was ordered included Beef Taquitos ($6) and a personal pepperoni pizza ($8). Both of which were good, but not anything out of the ordinary. And the beers were the same as buying a bottle at any other bar or even store. The atmosphere was very much that of a sports lounge, albeit a compact one. There were several HD monitors broadcasting sporting events and ESPN. Nothing special about this happy hour in and of itself, my suggestion is to pass on it.

Irvine China Garden HH

Irvine China Garden located on Jeffrey in Irvine, is completely misleading in advertising its late night specials. Both on Yelp and by calling them, they claimed to have late night dim sum specials from 10pm to 12am and a full bar. Upon arriving and being seated, it took 15 mins for anyone to come over and take our order. Despite the title of the restaurant having the subtitle "Dim Sum Restaurant", the waiter told us that they don't serve any. And that their late night specials were only pertaining to other dishes priced $5.50-$10. Most of them were noodle dishes.
Their full bar on the other hand consisted of sake, bud light and Budweiser. None of which were on special either. The food that we ordered included a seafood combination pan fried noodle (pictured) and a spicy beef dish. Both of which were not good.
This place was awful from its misleading falsification of its menu items and prices to its lack of anything resembling good service. Do not visit Irvine China Garden if you're looking for a deal or anything but rude employees.

Mizuki Happy Hour

Mizuki, a Japanese Sushi and Ramen house located next to Sport Chalet off of Jamboree in Irvine, has great late night specials. The atmosphere is laid back and high end. 7 nights a week there are specials from 7pm to midnight. Wednesday nights, there is 1/2 off all sushi and $1 hot sake. Note: Wednesday nights have no crowds either.
The hot sake is good for those that like to sip on their alcohol like tea, rather than take shots or chug beer. The sushi that my group tried included the spicy Godzilla roll (pictured), Salmon Skin hand roll and California hand roll. The hand rolls were all good tasting, but were also small. They were just one hand roll per order. Unlike the sushi that came on plates of several small rolls. Everyone who ordered sushi liked what they ordered and agreed that it was a great value for the portions and quality of the food that was received. Next time you're hungry late at night, be sure to hit up Mizuki for great Japanese flare.

Charlie Palmer's HH

Charlie Palmer's is a steakhouse located next to Bloomingdale's in South Coast Plaza in Costa Mesa. The atmosphere is very upscale but also relaxed. Most people in the restaurant dress up slightly in order to go to this location. Late night happy hour is from 10pm to midnight Tues-Sat. This happy hour includes 1/2 off glasses of wine, cocktails as well as draft beers.
The Lychee Martini ($7, regularly $14) is one of the cocktails ordered by my table. Those that had it thought that it was very good in the sense that it wasn't too strong on the alcohol and tasted like something someone who doesn't like liquor would want to drink.
The beers that were ordered, included the Golden Monkey (pictured) that was $3.50 (normally $7), and the Gonzo. The Golden Monkey looks like a light wheat beer, something along the lines of Blue Moon. However, it is a misleading appearance, given that it tastes like a dark beer, similar to Guinness. The Gonzo beer is a dark beer, but looks as dark as you would expect it to.
Appetizers ordered included the lamb burger slider, kobe beef sliders and calamari. All of which were ranging from $9 to $10 and were not on happy hour special. However, the table said that the kobe and lamb sliders were enjoyable, but to pass on the calamari, which was said to have been overly dry.
Charlie Palmer's is a good choice if you just feel like having a drink in a high end atmosphere, but skip it if you want to get good deals on food.

Elephant Bar HH

Elephant Bar, located on Culver in Irvine, just implemented a late night happy hour. 9pm to close 7 days a week. On weekdays, the bar closes at 10pm. All happy hour deals are only honored if you dine in the bar area. The deals include appetizers ranging from $3 to $6. As well as drinks ranging from $2 to $6. Appetizers include the Quick Seared Ahi Tuna with Ponzu ($6), Vietnamese Shrimp Spring rolls ($5) and the Baja chicken quesadilla ($4). All of which were thought to be good by those who ordered them, however the spring rolls were thought to be a little on the plain side as far as taste quality goes.
Domestic beers are $3, but only include drafts such as Bud and Coors. For imports like Stella, there are choices of small (pint for $5) or Tall (pictured, right $6). Also martinis and margaritas are available for $6 each and well drinks are priced at $3 each. The atmosphere for Elephant Bar consists of a rounded bar area, with t.v. monitors displaying various sports programming and tall tables meant to be stood at, with only a few actual seats.
Not an amazingly out of the ordinary happy hour, but the fact that many people have to stand made this a unique and in some ways, more social happy hour than others that have seating at a large table.