Green’s Dictionary of Slang

dancing school n.

a brothel.

1593		Nashe Choise of Valentines (1899) 9: Blushing, she replide, ‘Because I in this dancing school abide?’.
1606		Dekker Seven Deadly Sinnes II 52: Letchery is patron of al your Suburb Colledges, and set vp Vaulting-houses, and Daunsing-Schooles.
1642		Strange Newes out of Woodstreete A2r: I have been in one of the Damnablest Baudy-Houses [...] Hell cannot afford such a sinke of Sinne, nor such a Dancing Schoole of Damnation.
1660		Wandring Whore I 8: My advice therefore to you (that keep Dancing-Schools) to keep handsom likely strapping Wenches that will throw their Legs over mens heads, and show all for nothing, always in readiness.
1676		Night-Walkers Declaration 4: The time we should have spent in learning Good-houswifry, was trifled away at the Dancing School.
1687		T. Brown Liberty of Conscience in Duke Buckingham’s Works (1705) II 131: Why not into a Bibbing-house, as well as a Dancing School, a buttoc-ball, or the like [F&H].
1698		N. Ward ‘Ecclesia & Factio’ Writings (1704) 39: You urge a barn, or Stable, where you meet, / A Field, a Coffee House, Dancing School, or Street / Are fit for Heavenly Worship and for Prayer.
1700		N. Ward Dancing-school 4: I had recourse to a Dancing-school, which I thought was the best Rendezvous of willing Tits.
1711		N. Ward Vulgus Britannicus III 39: And holy Places that have been, / Long since the nurseries of Sin; / Perhaps fam’d Dancing Schools before, / May happen to be so once more.
1838		Crim.-Con. Gaz. 22 Sept. 34/1: A visit to the Greville-street dancing academy.