I think free drinks still happen. They'll be mixed weak as hell and you'll wait 45 minutes for the waitress to get back with it, so you'll have lost a lot of money in that time frame for your "free" drink.
I also try to avoid Vegas. When we went for Adele, we left here Saturday morning got there in enough time to have dinner and see the show, and we were back on the road by I think 8:00 the next morning.
From here even though I don't like Vegas, at least it's an easy overnight trip, that's a drive instead of a flight, and not something like most of you having to come in from the Midwest / Atlantic states. So if there's a show that we REALLY want to see, we can make it less crazy of a trip.