I'm very tall, with wide shoulders. In some venues, the seats are sloped enough I can see well enough if I stay sitting, even if the person in front of me is standing (though I won't comment on the lack of leg room). Club shows are different. If there's no seats and you want to be close to the stage, get there early. If you can't see over me, tough luck (unless you're in a wheelchair, I will gladly let him/her in front of me). I rather enjoy the 3 or 4 feet of empty space behind at those shows, it keeps the temperature down a little.