There's a pretty good number of us around the northern Virginia, Maryland, D.C. area. I'm sure the others will slowly start chiming in.
Moving here from socal, what you may not know is that July and August are full of weekend lacrosse tournaments. I'm tied up with my sons' tournaments for the next 5 weeks. Baltimore this weekend, Princeton NJ after that, followed by Boyds MD and finally in Metuchen NJ.
But hey, maybe some of the others are available on the 9th! hope to meet you some day!