KOS Sauna
BathhouseSaratoga Springs, New York
A floating Nordic-style sauna moored on Saratoga Lake, with a 15-person cabin, roof terrace and lake plunge, open daily except Monday.
$
Spas with groups
3 spas match
Los Angeles, California
Four Seasons hotel spa in Beverly Hills with a steam room, rooftop pool, fitness center and eight treatments, open daily, day passes available.
$$$$Four Seasons Hotel Miami
Hotel SpaMiami, Florida
A hotel spa inside the Four Seasons in Brickell, reserved for hotel guests, with rooftop pool and bay views as part of the stay.
$$$$