Keep in mind that the $5 per person charge is an automatic
gratuity charge -- not a cover charge, not a dinner charge. According to
DCL's official
Fun Onboard Q&A page:
<DL><DD>
Is there a romantic restaurant just for adults?
The ship features an adults-only alternative restaurant called Palo. Dining hours
for Palo are 6 - 11 p.m. Reservations are required, and taken (once on board)
on a first-come first-served basis. Palo dining is limited to Guests 18 and older.
There is a service charge of $5 per Guest for gratuities.</DD></DL>
So, for a couple, that's an automatic $10 tip. As with tips in US restaurants, I think it's safe to say that the tips are divided among various people who serve you.
My guess is that most Palo diners don't tip above the mandatory tip and the automatic tip on the drinks. DCL is essentially saying, "we've automatically charged you the appropriate amount for tips," although there is a line on the bill to increase the tip.
The service at Palo is excellent and the servers really deserve more.
There are some very generous people on the DISboards. Whenever the question of tipping at Palo comes up, they post that they leave $20 or $30 or even $40 above the automatic tips. I assume these people also leave $50 tips on $100 meals when they dine at restaurants back home. I don't think that's common or expected, either at Palo or at a dinner house on dry land.
If a couple adds another $10 in addition to the automatic $10, that's a $20 tip, plus the automatic tips on the drinks and wine. That seems like a good tip.
Whether you tip nothing extra, a few dollars extra, $10 per couple extra, or you choose to be very generous is a personal choice. Nobody reading this board should feel they must budget an extra $25-40 per couple for Palo dinner gratuities above the $5 per person automatic gratuity charge.
By the way, part of the $10 brunch charge goes toward the glass of sparkling wine or sparkling cider that comes with the lunch, so the tip portion is probably only around half of the $10 per person charge.