The person who said that sounds like a real idiot.
I think he/she hasn't got a clue about 1) how to be happy in your own body regardless of size, or 2) gym's in general.
I make no secret of the fact that I am into fitness and weight training, even though I am a FA and love very fat women. I would NEVER tell somebody to live their lives and shape their bodies the way I try to shape mine, because I do it for me and not to please anybody else.
Oh, and I hate gym's too !!!
I train at home, because the few times I have been in gym's, the attitude stinks. The steroid boys all look down on the smaller natural guys, and the superfit 8-pack boys look down on anyone who has more than 8% bodyfat, it's so pathetic and something I never want to be a part of.
Love your body whatever the shape, and if you don't love it, change it by making it fatter or fitter whatever turns you on