I agree with the whole social aspect of weed.
Once I was at some party where I did not know a lot of people. I pulled out a bong and seddenly we were all sitting in a circle, toking and talking. Come to think of it, it probably wasn't such a great ide (under cover cops?) but someone was already chuffing one of those plastic home made bongs (it was so black and rank that nobody else would touch it) so I thought it would be safe.