SweatHouz Preston Royal

Sessions are private: you book a suite, usually through the SweatHouz app, and have it to yourself for up to an hour, alternating between the infrared sauna and the cold plunge at your own pace. Allow an extra 10 to 15 minutes at the end to shower and get dressed.

The studio opened with eight sauna suites and also offers red light therapy and compression and percussion recovery tools. It suits people who want a quiet, solo or couple's heat-and-cold routine rather than a social bathhouse. Single sessions, packages and memberships are sold, so check the app for current prices.