I'm not quite sure if you can or not either. o_0 Never really thought about that, but currently there isn't a spot on the forums where you can share Friend Codes and meet up with others. If you want to meet up with someone and play a mini-game or whatnot, the best you can do is ask one of your friends here or seek someone who might have a friend code in their signature and stir up a conversation to see if they might be willing to play some games with you.