...by whether or not you can sing karaoke in front of them.
And yes...I'm so glad that John and I have found a couple that I can belt out Hotel California and Livin' on a Prayer with during our Rock Band Gig. I think what I'm most proud of is that I actually scored in the high 80% on my first two tries. :)
Whats your judge of a true friend...what would you do with them that you wouldn't do in casual company?