I don't think a guy's health should be determined by how ugly or attractive he is. So, no, I encourage all people to be healthy, and it's nobody's place to have an opinion about whether or not you should be there. Plus, if you're healthy, you look more attractive (so, it seems a bit silly to want somebody to leave who's trying to make themselves look better?).
You're kidding right? The gym isn't a catwalk, it's where people go to start getting healthy and get the physical activity they need. That's a horrible mindset for anyone to have & anyone who believes they are too ugly for the gym I feel very sorry for because they must feel so insecure and sad there.
There are no ugly people. That is my opinion. Noone is ugly, it's all about mindset and doing the best with what you got.