...is a bit of a cross-Atlantic cultural situation. Our friends in the UK have it all added in prior. Here, the anomie...like opinions, which everyone has one of (like something else everyone has )...exists because there are no hard and fast rules vis a vis tipping. T.I.P.S.= To Insure Prompt Service. The 'suggested' tipping guidelines you see printed in visitors' magazines are a joke. If the tip is warranted, it is given. If you are dealing with a moron, no tip at all, and I have no qualms about leaving a moron empty-handed.
David was just trying to feel out a protocol...look, if it's a little pot, what are you going to tip for?? If more substantial, then a 3-4% tip seems reasonable. But again, it's a matter of service. If you are dealt to by a lugubrious grouch or an incompetent who cannot calculate payoffs (and how did that dummy ever pass the audition at the Paris????) then don't pi@@ in the wind is a great tip
And don't get me wrong. I'm a george from way back- I tip everyone from the maids on up. But I also expect a certain level of service. Craps table- no "thanks for the bet"- no more bets for the dealers. A $1000 Royal, I tip 20-100 depending on who and where. I also like to get people fired, and have done so at the Nugget and Sam's Town, both times for service-related issues. David, you should have called in the Shift Boss at the Paris and made a huge stink- any suit hustling tips should be pushing a broom, not a pen.
Tip what your heart, not what anything or anyone else tells you...I know you're not a cheap guy, just looking to do the right thing...so: bad service, no tip; good service, good tip.

Just my two cents...pence...francs...Reichsmarks..
MP