How do you keep the shower curtain closed at your gym?

I'm just going back to the gym for the first time in a LONG while. I shower at the gym because the only way I'll force myself to go is when I'm on my way to or from work. I ran into an issue with the shower curtain not closing properly...and when people p to see if someone's using the stall...well, it's awkward and uncomfortable (for me anyway). How do you keep the curtain closed at your gym? I'm seriously considering bringing velcro bits along with me and sticking them to the stalls in the hopes that the adhesive will stick through the shower...lol. Maybe I'll try a suction cup and stick a loop on the curtain without damaging it somehow. If anyone has any brilliant ideas, besides obviously getting used to being naked in front of complete strangers, please, chime in!