She followed her. She went down a narrow passageway between two big hab-blocks built of dark, crumbling prefab slabs. It soon smelled of urine and old sweat, of drains and discarded carb-bars. As she wound further down the alley, the noise of the men’s footfalls, their laughter, faded. Perhaps they’d gone straight on past. Perhaps they’d never really been that close.

It got hotter. She felt the boom of the music well up from under her, around her, as if the walls themselves were vox-emitters. She needed a drink. For some reason she was very thirsty.

The girl brought her to a door – a heavyset door in a blockwork wall, one with a slide panel in the centre. She activated a summon-chime, and the slide opened, throwing out greenish light from within.

‘Elev in?’ the girl asked.

‘He is,’ came a man’s voice.

The door clunked open. Warm air billowed out, and music came after it, heavy, thumping music. She felt it move through her body, make her want to get going, to get back to that place she’d managed to reach a while back, where everything was forgotten save for the movement, the heat, the heartbeat of escape.

The girl pushed her inside. They were at the head of a long flight of plastek-topped stairs. The walls were bare cinder blocks, the floor sticky with spilled drinks. It was hard to hear anything at all over the music, which seemed to be coming from everywhere at once.

‘Down,’ said the girl, smiling at her again, encouragingly.

They went together. Soon they were in a bigger chamber, one full of bodies moving, throwing shadows against lumen-scatter walls. What had this place once been? An assembly chamber? A chapel, even? Not now. The light was lurid, vivid, pulsing in time to the heavy smack of the music. She smelled sweat fighting with commercial fragrances. She smelled the acrid tang of rezi. There was a high stage with murals half-hidden in a haze of coloured smoke, men and women dancing on platforms surrounded by kaleidoscopic lumen flares. The floor was jammed, crushed with damp bodies in motion. It was hard to breathe.

‘Just keep moving,’ said the girl, taking her by the hand.