Great idea!!!! My husband and I both tend to tip more the tipsier we get! Great way to reign us in on that!
I would say to simply TIP what you can afford too. As everyone has a different budget. Me personally I let the bar tender I'm dealing with know I will see him at the end of my trip and never had any problems. Jodie takes care of the maids As for the buffet, lunch and dinners, we usually tip as a group because we usually are sitting with a bunch of friends.
I usually meet the bar tenders the first day and find out if there are there for out entire stay.....if so I usually give a generous tip on the first day and a little bit each day after that