If its a place you need to be figure out how to interact with those people. How many people are we talking about? If its more than A couple I'd say you best be looking in a mirror because the person you see there is the problem.
Give them a little comedy back. Don't let them know it bothers you and have fun with it. Someone who makes fun of someone enough trust me is a very insecure person. They have to pic on somebody to make themselves feel good about who they are.
That is one of the great philosophical questions of all time. Emerson said the only real answer is removing yourself from the situation. Desiderata said to avoid them for they are vexations to the spirit.