the sign spells it out – rising hill or spring. on penton street you’ll find risinghill street.
Found the following quote about the playing of Rackets at pleasure grounds in Islington:
“In his Book of Sports and Mirror of Life published by Pierce Egan in 1832, there is a long description of rackets mentioning several open rackets courts other than the King’s Bench and the Fleet. One of these was at the Belvedere Tavern, Pentonville, where most of the Open Court Championships were played, amongst others in London (all public houses); the Eagle Tavern on the City Road, The White Bear Kennington, White Conduit House, the Rosemary Branch Peckham. ”
They do have table football and salsa lessons at Clockwork, which is what the Belvedere Tavern has become, but you’d struggle to find room for a game of Rackets.