About 10 years ago, was with a friend of mine at the Aria in Vegas, went to the sportsbook to have a few cocktails and watch some games we bet on. Usually you had to bet like $40 back then at places to get a free drink ticket, but it was $140 at the Aria! That was pretty steep just for a free drink, but I thought about it and if I bet on the over in a game, and my friend bet on the under, we were guaranteed to push and lose the rake ($14), but we'd get two drink tickets, or $7 a drink for top-shelf booze (plus a $1 tip). So we made a bunch of those and had our cocktails for $8 apiece rather than $20 or whatever they'd charge in cash. Might still work now, though don't know how much you have to bet these days for a drink ticket.