I was afraid that would be the case. You have a great attitude though - keep working on your skills in the meantime. As long as you keep your ear to the ground and nosing around, you'll get yourself situation with a band sooner or later.
It's interesting that you mention "Night Train" by GnR. That song has come up in discussion for our band. The other guitarist is a big fan. Sounds like it should be a fun song.
I agree - any song that you can play well that you show enthusiasm playing is bound to go over well with an audience. Boston had some great tunes back in the day...the stuff that air guitar was made of!
Good luck!