The restaurant pulls inspiration from iconic French duo Serge Gainsbourg and Jane Birkin, as well as the neighborhood’s maisons closes (20th-century brothels) for its sexy 1970s-meets-South-Beach-inspired setting. Brass palms line the bar and baby blue, watercolor-painted walls give off hallucinatory effects. Boxing and yoga studios are housed in former ballrooms spread across three of Blanche’s six floors, with the gym’s pièce de résistance—the basement-level hydrotherapy infinity pool—located three stories below ground. Encased entirely by granite, the aqua gym features swim lanes with countercurrents and massage jets, crowned by a steam room and sauna at either end.

Brach

Last autumn, the Philippe Starck–designed Brach hotel opened in the up-and-coming 16th arrondissement with a 1930s boxing club-inspired gym. Set in a former 1970s mail-sorting facility, Starck accentuated the raw concrete and marble and added Surrealist and Modernist touches. In the lobby, a canvas painted by Starck’s daughter covers the ceiling, with the same pattern reflected in the carpet like a mirror. From the terrace, views of the Eiffel Tower loom in the distance, but the real selling factor lies in the basement. The subterranean sports club, which spans over 10,000 square feet, houses a Himalayan salt sauna and aqua playground, with thermal and lap pools offering water-based yoga, boxing, and pole dancing—classes that cater to a younger crowd looking for something more dynamic than traditional water aerobics. Members and hotel guests can book sessions with dedicated Pilates and barre instructors, consult with the curated team of private trainers and therapists, or even get a mustache trim or old-style shave at Brach’s outpost of Les Mauvais Garçons barber shop, a 20-year-old Parisian institution.

Spa Nolinski by La Colline

It would be easy to miss the entrance to Nolinski Paris on the Avenue de l’Opéra if you didn’t spot the two perfectly groomed doormen standing guard out front. The hotel blends seamlessly into the boutiques lining the bustling Haussmannian boulevard. French architect Jean-Louis Deniot created an entry carved from Carrara marble and a modern grand salon lined in silver leaf, where opera singers and jazz musicians serenade the crowd gathering for afternoon tea or a nightcap. The gym is every bit as sophisticated. No machines or locker rooms. Instead, you’ll find a boudoir-style changing room and sessions personally tailored by a trainer, which can take place in the nearby Louvre gardens or on-site at the Spa Nolinski. After a sweat session, members can sit back and soak in the candle-lined centerpiece pool, with the flickering flames reflected in the mirrored ceiling.