What are the NO TIP hacks in las vegas?

uber - no tip since on the app
hotel - no tip bring your own bags up
casino floor drink whores - have them bring 2 drinks and tip as if 1, have them bring a drink over and tell them you actually wanted something else but will keep the one they just gave, then bounce so they dont find you
restaurant - pay then wait until server is away then bounce
roulette/poker/card game - just dont tip
What comes around comes around
I want to believe