Chez Castel, Private restaurant in Saint-Germain-des-Prés, Paris, France.

Chez Castel occupies a three-story townhouse at 15 rue Princesse, near the Café de Flore, in a building that was once a grocery selling alcohol late into the night. Its salons are furnished with red velvet and gilding, with a luxury-bistro restaurant and a basement discotheque holding about 250 people. The facade is painted dark red, with four tall windows of small green-glass panes above solid panels and a brass-colored strip along the base.

Jean Castel, a nightlife host nicknamed the "king of Paris nights", opened the club in 1962 at 15 rue Princesse, in a three-story townhouse that had been a grocery selling alcohol late into the night. It became one of the most selective venues in Paris in the 1960s and 1970s. Bought in 1997 by Philippe Fabien as it neared bankruptcy, it reopened in October 2010 with a black facade, then again in autumn 2014 after a 1.5 million euro renovation that restored the red facade.

The name comes from Jean Castel, a nightlife host nicknamed "king of Paris nights" alongside Régine. Entry has always been controlled: you must be brought by a member, and regulars hold membership cards, which peaked at 2,500 in 1987-1988. Since 2017 the Prix Castel du Roman de la nuit has been awarded here each March to a novel inspired by the night.

Visiting requires membership or an invitation; interested guests should contact the venue directly for access and reservations. Planning ahead is important since entry is controlled and based on advance arrangement.

The 2014 renovation, costing 1.5 million euros, added a library and a winter garden; André Saraiva, as artistic director, hung a Keith Haring canvas, an Erró collage, a photograph by Awen Jones and three drawings by Roland Topor. The facade, painted black in 2010, returned to red.