Cash "tips" - I just prefer to call them some extra spending money can be fun. When a regular does that I always buy something new and wear it next time.
I live in Vegas and I actually got my favorite "tip" (extra) the other day. I love to bet NFL and the guy said, "Here's $100. Pick a bet." He was betting too. It made it fun. Then when he was playing blackjack said, "Here are some chips, good luck!"
I like when men bring things. If its possible I will put it on right there.. But I can understand why some men can't stop on their way. Or don't want to.
I never expect anything more, but it is fun when things are brought.
Edit: ps if anyone is coming to Vegas and plans on meeting me, you could always pack a few scratch offs! I love them and we don't have them here.