Cat,
Silly.
Don't you know that putting anything like "Girls" or "Women only" or "just the ladies" on a thread is going to get every guy on the forum to respond?
IMHO, "worrying" about your figure is unattractive. I have dated fat girls, skinny girls, tall girls, short girls, black girls, white girls, hip girls, and nerds. (some fit into more than one category, so there weren't that many, really)
None of my memories or feelings (good or bad) about any of these girls have anything to do with whether they were fat or skinny. My feelings and memories of these girls stem from their personalities. (seriously)
Although having nice hooters, and a cute little pooper may get the first look (for the wrong reasons), the personality will be what guys remember and either dig or not.
Just my 2 cents.