Overpriced tea-room was nice, though the waitress was a little scattered. The food was unremarkable (hence my comment of overpriced), but I think if you're going in only for tea and not for lunch then it's not bad. I thought that, all things considered, there was a low selection of teas, but the one I had (peach and melon-flavoured) was very nice indeed.

Nebula is indeed named after the shop, even though the shop is now no more. The club has survived even if the shop went under. :)