I usually tip a $1 per bag and $1 or $2 per drink depending the service.

15-20% for taxis, restaurant service & spa services.

Hmmm I tipped 30% for a taxi trip (short journey) and the taxi driver came after me as he said it wasn't enough...

Luci I hope you told him where to go

$1 per drink is acceptable most everywhere. Like many things in Vegas, there is no upper limit so you can tip what you want to if the service is really great.

First: I hope luci5 told the cab driver where to go in a REALLY LOUD voice.

$1 per bag is good but if they are making a trip for just one bag maybe consider a $5.

$1 for a drink in the slot area and you will always have a fresh drink. :)

15% or 20% is correct for just about everything else.

If you hit the million dollar jackpot don't do the 15% but deffinately do more than $1.