The Linq just posted on their Facebook page that they are offering a happy hour on the High Roller.
"Everyday from 4-7pm: $24.95 gets you a #HighRoller ride with an OPEN BAR in one of our bar-pods!"
I didn't see anything listed on the Caesars website, but maybe they just haven't added it yet? Seems like a pretty good deal, you could probably get in a couple drinks during the ride. I might have to try this on my next trip!