Add Yahoo as a preferred source to see more of our stories on Google. LONDON — When I received an invitation to a birthday party at a social sauna, my first thought was: "Do I have to be naked?!" ...

As people look for low-cost, high reward summer fun, social saunas are reporting a boom in popularity.

LONDON — When I received an invitation to a birthday party at a social sauna, my first thought was: "Do I have to be naked?!" Following a hectic 6 p.m. commute on public transit, the tranquility of ...