Where do I go?

Hello.

I got some free plane tickets to use in the summer. I'm going to hit the East coast but wondered where to go.

Currently thinking NYC but I've been there twice already. My other two major choices are Boston and Washington d.c.

Anyone from there or been? Which one is best? Chicago is one other consideration.

It will just be a quick two night stop over, some sight seeing, drinking, night club type trip. It will be in July.

Thanks.