I get the same reaction from nearly everyone, "Are you a pinball wizard?", said with that snarky look how damn witty I am grin.
I don't bring it up very often.
Yeah, people think they's SOOOOOOO clever when they start singing Pinball Wizard. I mean, sing *ANY* other song with pinball in it, and I'd be like "cool".
Attached pic is one of my office walls, so people ask me about it fairly often. I enjoy talking about it and answering their questions. A few coworkers have seen me play and they most often comment that they had no idea how much skill is involved, or that the rules are unique to each game. The main thing is I don't jump into the deep end and freak them out.
Most people I run into think it's cool that I do geeky stuff like run tournaments. You can do some really geeky stuff in life and people will be far more impressed than if you described your last weekend as "went to a movie and watched TV".