(11:45 a.m. EDT) -- Wonder if you have to tip extra at an alternative restaurant? How about if you're traveling solo but staying in a double cabin? Should you tip the head waiter? And when are seven times you shouldn't tip?
Glad you asked. We recently spent a week answering readers' questions and offering advice on onboard tipping. Plus, we polled readers and found out not only how they tip (prepay? Envelopes? Opt out completely?) but how much.