To join the North Jersey Aquarium Society just show up at a monthly meeting, fill out a membership application and pay the $25 annual dues. The next monthly meeting is tomorrow.
All the information as to location and time is in this link: http://www.njas.net/
I make the drive from South NJ too. In fact, I'm in your store all the time. Come on by to talk about fish, get some exposure for your shop, and enjoy the phenomenal free food.