When it comes to people coming up and talking while your playing and singing, it happens all the time. It's almost as if they are oblivious to what you're doing--they just want talk with the band guy. Most of the time, though, I think the folks that come up while I'm performing are blitzed out of their minds. Had a guy come up and request a song while I was in the middle of playing and singing Devil Went Down to Georgia, which is a tough song to do. He had a mug of beer in his hand, which he attempted to sit down on the top of the amp bead. Fortunately, the barmaid stopped him before he sat it there. She told him to write the request on a napkin and she brought it to me when I finished the song. As for sitting VS standing, I think B2 is right--no one really cares and you won't make another dime more if you're standing.

Gary