I went to the "Y" for years and I know what your talking about. I have seen people that hardly came back. Then some just didn't let it bother them. It is most you feeling this way, any one that would act decent shouldn't think nothing. We shouldnever judge others or the Bible says, the same will be done unto you.
One thing you could do is have a big beach towel with you. I have several that are almost as large as a table cloth. I too don't like to be barefooted. They make water shoes and sell them at Walmart or K mart for 5 or six dollars. You willfind them right in with the shoes. This time of the year it might be a little harder to find, but just ask a clerk. I keep 2 pair around just for a pool.
You can get skirts that snap at the waist, that are made of terry cloth. Again it might be harder to get them this time of the year. Impossible where I live. they have sales earily Fall. You live in a warmer climate than I tho, so check and see.
Hugs,
Billie