Many restaurants add an automatic gratuity for "large" parties. My wife and I ate lunch at a little cafe in Fort Lauderdale yesterday, and while I could lose a little weight, I don't think the two of us constituted a large party. And yet, our bill of less than $30 included a gratuity. The amount was less than I would normally tip. But I decided that since they set the rule, I would abide by it and the server lost out a little bit.
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014, 2016, Royal 2017
Star Clippers: Royal Clipper 2015