Sauna Etiquette

[jackk78]

My gym has a coed sauna (and steam and hot tub), which means swimsuits are required. Most of the men, of course, wear shorts. While I'm fine wearing a bikini to swim laps, I'd feel a bit out of place wearing one in the spa area. The smallest I've got in a square cut. I've gone au naturel at places like Baden Baden with men and women, but nudity is taboo in the US.

How do you feel about wearing a bikini in the sauna in mixed company?