At the start of Chapter 5, Lenina Crowne and Henry Foster are just finishing the first part of their date. They have been playing Obstacle Golf at Stoke Poges, though they apparently did not finish their round.
After that, they go dancing. They go to the Westminster Abbey Cabaret. While there, they dance to the music of Calvin Stopes and his Sixteen Sexophonists. The cabaret also has a "scent and colour organ." They dance until the place closes and then they go to Henry's apartment and start getting ready to have sex.