A fair weather fan is a fan who likes a team in good times (fair weather) and abandons them in bad times. It's not necessarily about attending the games in-person as many can't do that for a variety of reasons. I am a diehard hoops fan and attend only 1 or 2 games a year but I have been a non-wavering fan since the 70s.There have been a lot of great posts in this thread, but I'm not sure anyone can even define what a true fair weather fan is.