Well I've never heard of the Theater Room there, but from your directions it should be simple enough to find. Tomorrow, I'll make sure to walk into the main entrance and turn right.
I hope you're able to make it. While it'll be nice to play some people in the same room, it would be even better to, you know, actually play the guy that told me about this meeting in the first place.
As for my characters, honestly, I try to be good with every single character, but the the ones that stick out the most for me are Mario, Marth, Zero Suit Samus, Fox, Little Mac... and quite a few others.
And while I try to be good with all characters, Pit is one of the characters that hasn't quite clicked with me yet. I mean, I land plenty of hits on people, but just not too many strong attacks. So, I can't quite get the kill set up to finish them off.
I'm usually the one that gets finished from my opponent getting rage from their increased damage. -_-
I'm also kind of crappy with Mega Man and, strangely enough, Dr. Mario (despite Mario being among my top three.)
But anyway, I hope to see you tomorrow!