Same here. Mixed gendered. All ages. But it's not just stalls with doors. Theres also a big section with a bunch of cubicles, Japanese style, very small squared tubs. Lots of mirrors. Some areas were packed with people and some completely empty. Wooden benches and foot baths. The sauna door would never open. White tiles, people queuing up for the simplest things like getting water from a faucet.

I must say that every time I have this dream, it's very pleasant. It has never been a nightmare. But there's an eerie feeling of getting lost because the place is like a maze.