Heat Haven at Hoyt Park

Heat Haven runs a mobile outdoor sauna park in Hoyt Park, Wauwatosa, with wood-fired barrel saunas, cold plunges, a cold-shower 'chillotine' and fire pits. Community sessions last 75 minutes and cost around $35 per person; a private sauna for up to six people costs $150. Changing rooms and bathrooms are on site, swimsuits are expected, and sessions go ahead in rain or snow unless it drops to -10°F. Ages 12 and up with a guardian.