Look into "Pompeii" in West Hempstead, that's where I had my wedding. If you're having 50-60, it's certainly big enough, we had 100 at ours. We also got a good price since we know the owner, if you mention my name, and i'd give you the ladies direct number, i'm sure she would come up with a good price for you guys. I also have a DJ for you as well. If you still have my cell, shoot me a text and we can talk.
We also did our ceremony there before everything, I have a reverend as well if you need.