I guess I'm more tolerant than the OP, but I understand his position and it's a perfectly valid one. I don't smoke weed and never have. Not because I'm holier than thou but because I don't like the smell of smoke. Not even from barbecues. It seriously irritates my throat. That being said, my mom and dad both were heavy cigarette smokers and over the years I became accustomed to the irritation. Still annoying though. Long story short I've been around a lot of friends and bandmembers who smoke pot. Dozens upon dozens of people. And I've even been to a Pink Floyd concert and experienced the resulting contact high. I have yet to witness this "unlocking of genius" that so many pot smokers have talked about. I have only seen first hand people getting noticeably worse with their timing and attention playing after partaking. The net effect of smoking pot that I have observed is that it makes people hungry and/or stupid and generally relaxed for a while. Overall I don't see anything wrong with that so long as one isn't operating a vehicle while stoned. It's way less dangerous than high-fructose corn syrup in my experience as a diabetic. And that smoke can't possibly be good for your lungs, but I'll admit I have a bias on that aspect. If your high is worth your lungs well, that's your choice IMO. So in my opinion... Bad form to just light up without thinking of others. But I would have just put up with it and focused on if the music could be salvaged enough to get through the gig, then declined to continue after.