How do you say "How many roooms" in Japanese?

Question

How many Rooms exist?
Is there a seperate way to count rooms?

Answer 1

AFAIK, there is not a counter specifically for rooms.
122. 部屋; heya;hito; rooms.
Aha! Found something :D. Search engines ftw! Yup, just counted by rooms.

just that line by itself probably doesnt make too much sense so, here is the link.
http://www.trussel.com/jcount.htm

And, to finally answer your first question.

nan heya desuka. => 何部屋ですか。

Answer 2

watashi no nihongo mada heta desu