The Reading-born band, who helped define the shoegaze moment at the turn of the 1990s alongside Ride and Slowdive, is back out on the road for the anniversary run of Whirlpool, their 1991 debut. The album was the kind of record that dissolved the edges between instruments — vocals buried under reverb until they became texture, drums pushed back until they felt like weather — and the live version asks a room to agree to the same terms. Tuesday's crowd, a mix of people who owned the CD at the time and people who found it on a playlist recently, appeared to agree.

Aprilynne, who was near the back rail with a drink she hadn't touched in twenty minutes, said she'd driven up from San Jose specifically. "I saw them in '92 at a college show and I remembered it as being louder than this," she said, then reconsidered. "Or maybe I was just younger."

Chapterhouse vocalist and guitarist Andrew Sherriff kept the between-song talk minimal — a few words about the record, the usual thank-yous — which suited the set. Whirlpool is an album that doesn't benefit from explanation. The songs moved in sequence, "Pellucid" opening into "Treasure" into the long unspooling center of the record, and the room stayed with it.

Shoegaze as a live genre asks something specific of a San Francisco crowd: tolerance for volume that isn't aggressive, for songs that don't resolve the way you expect them to. This one gave it back without complaint.

The marquee outside, if you walked past it Wednesday morning, still had the date on it — not yet swapped out for the next show. The doors were locked, the sidewalk empty, the kind of block that looks like nothing happened there at all.