1. Do you regularly go to a gym facility (NOT CURVES type,but like Golds or 24 hour fitness)
Yes, I've always belonged to gyms and never had a problem going (even when I was the only female working out in the weight room with only males).
2. If you don't, would you be comfortable going to one?
If I didn't currently, I would feel comfortable yes. The times I haven't belonged have usually coincided with moving to a new area.
3. If you arent comfortable then why?
This isn't really applicable, however throughout my gym "career" I've been a spin instructor, over and under weight (currently way over) and have never paid attention to those who go there just to hit on men/women. As an overweight woman, if you're not comfortable interacting with those around you, then don't. People at the gym are there to concentrate on themselves and shouldn't pay you any attention, and if they do, they're really insecure about themselves.
"The woods are lovely dark and deep, but I have promises to keep, and miles to go before I sleep, and miles to go before I sleep." - Robert Frost