No, i hear the "Mon pere est a la cave"

In Quebec we'd use dans la cave

I'd like to know that as well! You say 'dans' for rooms so I guess so.

I want to know too. When it came to "bureau", there were three variations:

Dans mon bureau (in my office),

Au bureau (at the ofice),

a mon bureau (at my desk).

is this not the same with cave? and if not, is it unique to "bureau"?