The Underground Pickleball and Recovery Cave is a unique, private-rental indoor facility in Raleigh, North Carolina, running 2 dedicated acrylic courts with different playing surfaces (mirroring surfaces used at PPA tour events), paired with spa-style recovery amenities — hot tub, red light therapy, sauna, and cold plunge — in an adjoining “Recovery Cave.” The business operates like an Airbnb for pickleball: not a public drop-in facility, but bookable for private group use (up to 8 people per reservation, all must be members, membership itself is free) at $20 per court per hour, open 24/7, air-conditioned. A second location has since opened in Wilmington, NC. It holds a 4.8 rating across 42 Google reviews (a related listing shows 5.0/5).