Lunch in Cozumel
Have a great time in Cozumel. Depends what you want in a fun lunch. If you want great food and a nice atmosphere, you cannot beat Pancho's Back Yard. Their gazpacho is amazing. If you want good food, loud music, and lots of fun, Carlos and Charlies or Senior Frog's is the place to try.
Personally, Pancho's wins hands down.