So, a typical day:

1). My room is comped, so I don't tip for a room "upgrade" (very silly, IMO).
2). $2-$5 per day for the room maid.
3). $1-$2 per drink (even if it is water or soda) while gambling. Since I'm normally with my wife, let's say $10 for the day. If we're at the bar, the same or more for the bartender.
4). 20% tip on my comped meals
5). $2 for the valet.
6) $20 for video poker hand pays.

That's at least $50, probably at lot closer to $150.