What does 'mildewed cafe' mean?
I was adapting the work into a three-hour play that I would later put on in a mildewed cafe.

What does 'mildewed cafe' mean?
Is it an old-fashioned cafe?

Question

What does 'mildewed cafe' mean?
I was adapting the work into a three-hour play that I would later put on in a mildewed cafe. 

What does 'mildewed cafe' mean?
Is it an old-fashioned cafe?

Answer

A run-down cafe, overrun by mildew.  Basically, a cafe where no-one would really want to go.

Answer

mil·dewed, mil·dew·ing, mil·dews
To affect or become affected with mildew.

http://www.thefreedictionary.com/mildew