[the 2d. price of admission + hop n.1 (1): ‘the clog hornpipe, the pipe dance, flash jigs, and horn pipes in fetters, à la Jack Sheppard, are the favourite movements’ (Hotten 1867)]
[mid–late 19C] cheap dancehalls and the dances held at them.
[orig. two ropes strung across a room, with rough bedding (usu. sacking) strung between them, on which bedless tramps could lean and fitfully sleep for a 2d. payment; note Dickens Pickwick Papers (1836–7): ‘’Ven the lady and gen’lm’n as keeps the Hot-el, first begun business, they used to make the beds on the floor; but this wouldn’t do at no price, ’cos instead o’ taking a moderate twopenn’orth o’ sleep, the lodgers used to lie there half the day. So now they has two ropes, ’bout six foot apart, and three from the floor, which goes right down the room; and the beds are made of slips of coarse sacking, stretched across em.’]
[mid-19C–1930s] (UK tramp) a hostel, a casual ward.