Check out this Fortune.com article on the “business sauna.” (Thanks to Paul Tiseo for sending me the link.)
One other thought. Sauna has been horridly mispronounced in standard American English. Most Americans pronounce the word “sauna” like saw-na. This hurts my ears.
Pronounce it like you’re talking about a pig, a “sow”. Sauna is sow-na.
Or, think of the two ways you’ve heard “Saudi Arabia” pronounced. Saw-dee doesn’t sound right, does it? In the same way, the “sau” of sauna should be pronounced like the “Sau” of Saudi.