There is a book called something like Bawdy Songs of the Early Music Hall which collects together a fairly representative sample of the songs that were sung there in the first half of the 19th Century. They are almost without exception (a) extremely smutty, and (b) not very good. I had been hoping to dig up something with which to scandalise modern audiences, but these are mostly really charmless and surprisingly boring. The editor notes that he chose the least bad out of hundreds of similar ones -- the mind boggles.