Tipping has been quite a dangerous conversation in the past ---- so I'll leave my comments to Emily Post. Here are guidelines from the website.
Etiquette Everyday~General Tipping Guidelines
RESTAURANTS:
Wait service
(sit down)
15-20% pre-tax
Wait service (buffet)
10%
Host
No obligation
$10-$20 on occasion, if you are a regular patron
Take Out
No obligation
0-10% if the person went above normal service
Bartender
$1 per drink or 15-20% or tab
Tipping jars
No obligation
tip occasionally if you are a regular or if the person went above normal service
Restroom Attendant
$0.50-$3, depending on service
Valet
$2-$5
TRAVEL:
Skycap
$2 first bag, $1 per additional bag
Doorman
$1-$2 for carrying luggage
$1-$2 for hailing cab
$1-$4 beyond the call of duty
Bellhop
$2 first bag, $1 per additional bag
Housekeeper
$2-$5 per day, left daily
Concierge
$5 for tickets or reservations, $10 if hard to get; no need to tip for answering questions
Taxi driver
15% plus an extra $1-$2 if helped with bags
We have been lucky with absolutely fabulous Mousekeepers the last few trips -- so good I have spoken with the Hotel Managers and sent letters.
Have a fabulous trip!
Cathy