Spas with adults only in United States

A moderate-priced day spa in Des Peres, just west of St. Louis, open six days a week with a relaxation lounge and treatments geared toward couples and adults.

An adults-only hotel spa in Old Town Scottsdale with sauna, steam room, cold plunge and thermal pools, open to hotel guests 21 and up.

A hotel wellness area at Sheraton Music City near Nashville airport, open to guests 21 and up, with sauna, steam room, pools and a whirlpool.

Hotel spa inside The Highland Dallas in Lower Greenville, Dallas, with a sauna, steam room, outdoor pool and couples treatment rooms.

A downtown Cleveland med spa offering injectables, body contouring, IV therapy, hormone optimization and medical weight loss for adults.

Adults-only hotel spa in Carlsbad with steam room, separate men's and women's lounges, and couples massage as its signature treatment.

A walk-in salt room in Smyrna, just outside Nashville, offering halotherapy sessions plus reflexology and lash services for adults.

A head spa and massage studio operating out of a private suite at Salon Lofts in Huntersville, open Tuesday through Saturday by appointment only.

A moderately priced medical and day spa in central Scottsdale, open daily except Monday, for adults only, with walk-ins welcome though reservations are

A reservation-only, adults-only hotel spa in Las Vegas open daily 10am-8pm, in the moderate price tier.

Adults-only resort spa in Napa Valley with pools, sauna, steam and a fitness center, open to hotel guests and club members via day pass.

Adults-only hotel wellness setup in downtown Phoenix with a heated pool, sauna and steam room, day passes available for $50.

A 21-and-over hotel in Johnson City, NY, with a sauna, hot tub and fitness center for guests staying at the property.

A medical spa on San Antonio's Far West Side offering massage, facials, injectables and laser hair removal, open weekdays and Saturday mornings.

A 25-room Sonoma hotel in Forestville with a spa barn offering sauna, steam and pools, mainly for overnight guests.

A Oak Creek, WI massage clinic and day spa with adults-only access, listed hours only on Sunday, and a moderate price tier.

A reservation-only day spa in Blue Bell, just outside Philadelphia, with moderate pricing and adults-only access.

An appointment-only luxury day spa in Bartlett Station, Memphis, with service packages priced up to several thousand dollars.

Day spa in a Montebello strip mall plaza offering facials, massages and body treatments, open daily with walk-ins accepted.