Saunas are the hot new hangout spot, so I tried a $44 social cold plunge class. It was awkward — until I took an ice bath with a stranger.

Saunas are the hot new hangout spot, so I tried a $44 social cold plunge class. It was awkward — until I took an ice bath with a stranger.

Kim Schewitz in the 65-person sauna.Francesca Jones for BI"Social wellness," which blends socializing with health and fitness, is becoming more popular.A Business Insider health reporter went to a social sauna and ice bath class designed to reset the nervous system.At first it was awkward, but that changed when she got in an ice bath with a classmate.I turned right at Barry's Boot Camp and arrived at my destination: Arc, a communal sauna and col…