This set the ball rolling.

Song followed song, the pick of the music-halls.
Jonah gave a selection on the mouth-organ.

Then Barney, who was growing hoarse, winked maliciously at Jonah and Ada, and struck into his masterpiece, "Trinity Church".

It was the success of the evening.
She told me her age was five-and-twenty, Cash in the bank of course she'd plenty, I like a lamb believed it all, I was an M.U.G.; At Trinity Church I met my doom, Now we live in a top back room, Up to my eyes in debt for 'renty', That's what she's done for me.
The chorus rang out with a deafening roar.

The guests, tickled by the words that fell so pat, twisted and squirmed with laughter, digging their fingers into their neighbours' ribs to emphasize the details.
But Barney, in trying to imitate a stumpy man with an umbrella, as the song demanded, tripped and lay where he fell, too fatigued to rise.
Then, saddened by the beer they had drunk, they grew sentimental.