Common Japanese symbol

Here is a のれん (Japanese doorway curtain) with a symbol that is commonly seen and easily understood in Japan. But, how about outside of Japan? What would you assume that symbol means? What do you think this curtain is the entrance to?

***edit 2015 June 13th***

As of June 13, 2015, most people (by a wide margin) chose “Hot Spring” as the meaning of the ♨ symbol…and that’s correct!

I guess this poll was too easy. I’ll try to make the next one a bit more difficult.

Thank you to everyone who participated in the poll.