Potatoes said..
there will be 2 suppers out the front and about 20 on the alley side.
I've noticed that too, the limited amount of sessions i've had there. I find the right hander works pretty nice from the alley/river mouth, but tends to close out a bit further north (on the beach break).
I agree with your theory that everyone hangs out together - the same mentality exists in kitesurfing. "Hunt with the pack", I guess.
I always try to avoid the crowds, in both sports. I've got no issue with beach breaks. I surf mainly open beach breaks, they can be fun, short rides provided you are happy to challenge yourself in the paddle back out.