Green’s Dictionary of Slang

very poor lodgings.

1608		Pennyless Parliament of Thread-Bare Poets in Harleian Misc. III (1809) 76: Those that depend on destiny, and not on God, may chance look through a narrow lattice at Footmen’s Inn*. [...] * Bridewell.
1612		Rowlands Knave of Hearts n.p.: Which at the heeles so hants his frighted ghost, / That he at last in footmans inne must host, / Some castle dolorous composd of stone, / Like (let me see) Newgate is such a one [N].