I'm curious about what kind of complex tricks he does. Decades ago I had a pionus that came to work with me at a magic shop (sadly, he died very young of congenital kidney disease). Miko LOVED performing. He knew how to flip upside-down, pick a card, and a few other tricks we'd worked out. His very favorite "trick," though, was one he invented himself.
The store had these glass-top display cases, and when Miko sat on them, people would assume he was a magic prop of some sort. So he'd sit on the counter and hold perfectly still as they strolled along, checking out the merchandise. Then, when they were directly above him, he'd ever-so-slightly turn his head to look up at them, causing them to jump back and squeal as they realized the bird was alive. He LOVED doing this, I assume because the reactions were so dramatic.
I imagine a bird doing tricks in a bar would get similarly extreme reactions. I could see him genuinely enjoying the time spent performing. He'd be getting lots of time with his human, lots of interaction with different people, and probably a ton of positive feedback for his tricks. As long as the bar wasn't smokey and they weren't actually giving him alcohol, I don't really see the problem.
That's why I'm asking about the tricks themselves. Are they things that would be uncomfortable or distressing for him to perform? Maybe there's something I'm missing.
Parlor tricks aren't any different than target training, playing birdie basket ball, or sorting colored discs. They're all just bonding games and clearly kept his mind stimulated. He's sharp as a tack and in seems to be in good feather. 
