We just spent a few night in Atlantic City in NJ. The marina was Kammermans. Lots of night life. Not a lot happening at the marina but LOTs happening around the marina - day and night. They had a good ships store and where super nice people. It is right across from the Golden Nuggett Casino that also had a marina and a bar, the price
was double there.
I also like City Island Yacht Club - they have LOTS going on around the marina tooo but it is moorings not slips. I am also from the Bronx so I like this area. I am sure other people on this site will know a little more about some other places!