Own the geekiness.

Being comfortable and confident with who you are is the most important thing in life IMO, and other people gravitate towards people that are confident.

You can't fundamentally change who you are... it just doesn't happen, but you can grow gradually through your experiences, so I say take full ownership of who you are and don't force yourself into super uncomfortable situations. I say try it out, but be prepared to drop it if you find that it's just not for you.