I agree that a three-player game is not as interesting as with more players; but, unfortunately, I rarely have a chance to play with more players.
Have you tried the friend finder on this site? I've also found Meetup useful for meeting gamers.
Thank you for the tip, but I am not interested in finding other players just to have a bigger game of Cosmic. I play games often enough anyway.
I have a regular monthly game group of old friends, two of which like Cosmic Encounter, one who rarely shows up, and the fourth is not much of a Cosmic fan. Also, we have so many games that we do not even play Cosmic every time.
I play with my two sons, but my daughter prefers Dominion.