question

Shalom Rabbi Michi
I usually go to the gym.
My gym is in Country Sports. 90 percent of them are men or older people, but rarely there are a few girls (older women and maybe young ones here and there).
Am I forbidden to go to a mixed group even though it doesn't stimulate my desires in any way (Ritva Suf Kiddushin, too, and I recognize my desires here) and even though they're practicing, I'm not interested in them at all and I don't look in their direction and they don't "attract me" in the literal sense of the word. Is this okay or is there some concern that it's "mixed"?