Does he play board games? A board game convention might work. Think beyond Comic-con.
yes, there is great variety out there, nowadays!
edited to add:
good resource to get started:http://www.upcomingcons.com/ I didn't think I myself would get a lot out of these cons, however everybody in my family really enjoyed the last one. It was pretty broad, even though it was for 'anime', there were video gaming rooms, board gaming rooms, cosplay (and everyone was very friendly, non-judgemental), and a surprising focus on the intellectual side of all these. ex: japanese culture - we saw panels on traditional myths being played out in modern stories, feminism in anime., panels on body pride via cosplay, art shows, etc., etc. Not just for guys, obviously.
