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About
Kristallgrotte, in the southern industrial area of Oensingen in the canton of Solothurn, has been operating since December 2001 and is open only to couples (a woman and a man) and single women; single men are not admitted. Its roughly 900 m² include themed rooms, a grotto bath, a whirlpool, an outdoor pool, a sauna, a winter-garden restaurant and a smokers' lounge. It opens Tuesday to Saturday from 1 pm and stays open until 2 am on Friday and Saturday nights; it is closed on Sunday and Monday. A buffet is served from 6 pm on Fridays and Saturdays, and soft drinks are included in the entry fee. Registering in advance lowers the price. Payment is in cash, in Swiss francs. First-time guests are shown around.
When it's open
Tue 1–6 pm; Wed–Thu 1–11 pm; Fri–Sat 1 pm–2 am. Closed Sunday and Monday.
House rules
Couples and single women only. No means no; closed doors stay closed. No sexual activity in pools, baths or the sauna; bathing in the grotto bath and whirlpool is nude. No outside drinks; smoking only in the smokers' lounge and marked outdoor areas. Payment in cash; no credit cards.
Dress code
Erotic, well-kept clubwear or lingerie; regular street clothes are not worn in the club area.
Getting there
Grabenackerstrasse 9, Industrie Süd, 4702 Oensingen
Show on mapSource: venue's website · As of October 13, 2026