La Référence du Siècle is a club libertin in Chennevières-sur-Marne, in the Val-de-Marne east of Paris, open to consenting adults only. It has a sauna on the premises and a hammam, which its own site says is currently under works.

The week is in two halves. Wednesday, Thursday and Sunday are early evenings from 17:00, and between 17:00 and 20:00 the club takes couples only, with entry free and only drinks paid for. Friday and Saturday are late nights from 22:00 until 05:00. Entry always includes soft drinks and a sweets buffet, with alcohol paid for separately.

The club publishes its own règlement intérieur, asks for correct dress and reserves the right of admission, and bans phones and cameras outright. It runs a membership card — four entries earn a reduction on the fifth — and a programme of special evenings. It gives its own public-transport directions: RER A towards Boissy-Saint-Léger to Champigny, then bus 208 to Fusillés de Châteaubriant and 800 metres on foot.