The first market intelligence platform for saunas and bathhouses

Why HeatCheck exists

Bathhouses, social saunas, contrast-therapy clubs and private sauna suites have become a distinct category, but decisions in it — where to open, what to charge, what a site will earn, what an operator is worth — have been made without market data. Hotels have STR and short-term rentals have AirDNA; saunas and bathhouses had no equivalent until HeatCheck.

What HeatCheck measures

Every venue HeatCheck tracks sells time through a booking calendar. HeatCheck reads every bookable timeslot on those public calendars, every 5 minutes as standard, and records how much capacity remains. When capacity disappears, a booking happened. From that it measures, for every venue:

• Utilization: the share of offered capacity sold by the time each slot starts, by timeslot, half hour, day and month.
• Units sold and supply, in each venue’s own unit (admissions, class spots, sauna seats, private-room blocks).
• Revenue (gross booking value) from sold units and the venue’s posted prices, packages and memberships, with a P10–P90 interval.
• Revenue per open hour, price ranges, booking pace curves and next-day forecasts.

What makes it different

• Measured, not surveyed: figures come from live booking inventory, not self-reported operator data or foot-traffic proxies.
• Raw is truth: every response from every poll is archived verbatim, and every figure can be rebuilt from those archives.
• Unknown is never zero: a slot whose outcome was not observed stays unknown and widens the interval instead of reading as empty.
• Uncertainty on every estimate: utilization and revenue carry a P10–P90 interval and an A–D grade for how tight it is (and a P50 for revenue).
• Proven and versioned models: each venue’s model is checked against its own raw data, and a changed formula is a new version, never a silent edit.
• Comparable across venues: every venue produces the same figures on the same grid, and units of different kinds are never added together.

Coverage

New York City is live with 21 venues across Manhattan, Brooklyn, Queens and Staten Island: bathhouses, social sauna and contrast-therapy clubs, infrared and traditional sauna studios, private sauna suites, day spas and banyas. Collection is under way in further US metros, and any venue or market with an online booking calendar can be added through bespoke research.