You're Telling ME to Wear Sneakers?

So I walk into LA Fitness and the mousy girl working the desk-- if she had handles I could have dead-lifted her-- tells me I can't work out while wearing sandals . . . though I've been working out at LA Fitness for five years now while wearing sandals, as they are convenient foot-wear if you also want to swim or shower after you lift (plus I have a problem getting socks on my feet when it's humid, probably due to their hairiness) but she's insisting that I can't wear an "open toed shoe" while I lift weights, so I ask her about Crocs-- which are not technically open-toed-- and she considers this back-talk and says, "You want support when you work-out, so wear sneakers . . . okay?" and I'm about to get into the whole barefoot running thing and how I DON'T want support when I work out and how I often shoot baskets on their court barefoot, but I decide it's not worth it . . . and, finally, she did allow me on the floor with my sandals . . . but I had to promise that next time I would wear sneakers . . . and now I'm seriously considering getting some of those Vibram Five Fingers minimalist running shoes just to fuck with her.