Another option is to look at somewhere like Scuba Club Cozumel. When I went on a shop trip there in June, we could do unlimited shore dives in the afternoon or after the afternoon's dive, if we wanted.
I will second what others have posted; Cozumel diving tends to be much deeper than what you'll find on the East Coast or many other parts of the world.
I will second what others have posted; Cozumel diving tends to be much deeper than what you'll find on the East Coast or many other parts of the world.