If it's a packed venue, you could get away with puffing inside. Stay in the middle and don't make it obvious, and you might get away with it.

Better just do it outside. That way you don't risk being roughed up by bouncers, getting kicked out and not finishing your joint.

I figure there will be other metal/potheads there too. You might even run into a few and they'll match you. I love it when that happens. You haveone joint, then suddenly there's like 3 being passed around. :thumbsup: