Buffet where drinks are brought to me: a buck or two per person for coffee/coke service, a little more if they're topping up your sparkling wine or mimosas regularly.

Self-service buffet, fast food, coffeeshop: no tip. I'm in a Starbucks maybe once a month, and I never have to sign for anything...so I'm not even sure *how* I'd tip unless I had dollar bills on me (which I never do). The tip jar is sitting there, but without any mobile/electronic functionality, it's kind of useless to me even if I *wanted* to tip.

I would hope that all employees in all of these scenarios are paid a non-tipped wage, although it wouldn't surprise me in the slightest if casino operators hose their employees when they can get away with it. I'm pretty sure Starbucks isn't paying baristas $2.13/hr.