From Longman Dictionary of Contemporary Englishfleapitflea‧pit /ˈfliːˌpɪt/ noun [countable] old-fashioned TBBDIRTYa cheap dirty cinema or theatre – used humorously
Examples from the Corpus
fleapit• He is wincing in a 1940s fleapit auditorium where they are showing a crass adaptation of one of his books.• Went to work in the Regal, some movie palace, a right fleapit.• I recall when Nancy Leadbetter and I stayed in a terrible fleapit of a room in Siena. 