Les Thermes is the largest gay sauna in Toulouse, around five hundred square metres over two floors near place de Belfort, a few minutes from the Jean-Jaurès metro. It has a second entrance on rue Denfert-Rochereau.
A large hammam, a proper jacuzzi, a dry sauna, communal showers and rest rooms, with a bar. It runs a fixed weekly programme rather than occasional parties: a naked and underwear evening, a naturist Saturday once a month, a young men's night, and one evening a week that is open to everyone regardless of gender or orientation, which is unusual for a gay sauna and stated as such on the site.
The same operator runs a sauna of the same name in Marseille, so check which city a search result is talking about.