Good suggestions passthepotatoes.
My oldest didn't have a real friend until he went to 6th grade. Ironically the boy lives 3 houses away and they never knew each other, but have turned out to be good friends. I say "good" because DS is really a loner and enjoys his time alone as well.
The friends of my kids seem to be 2 yrs older, moderately gifted, with similar interests. I agree that taking them to more esoteric clubs or activities (we have a Model Club-for plastic model making of ships or tanks; Astronomy Club; Chess; Literacy Council Knowledge Bowl; etc.) or activities--Community theater, talks, library programs.
One key skill/ability to help our children with is to teach them how to be happy alone, entertain themselves, because close friends in life are not a guarantee, and probably less so for PG kids/adults. Even if they found "peers" (a few PG kids) they may not hit it off.
