In reply to flopsicle:
I think this can make my day when I visit at a wall. Have a nice chat with people, see people being encouraged to try and have fun, doesn't matter if they're on a 7b or a 6a.
On the other hand, I've been at a couple of bouldering walls which at the time did not seem very sociable and had a distinct lack of encouragement and a nice vibe. :p But I guess not everyone likes to hear "Go for it", some people thrive on perfect unhindered concentration.