Sunday, August 18, 1968 closed both weekend stands at once. At Fillmore West, Creedence Clearwater Revival finished the second bracket of BG-133 over It's a Beautiful Day and Albert Collins; at the Avalon, Bill Haley and the Comets, the Drifters, and the Flamin' Groovies played the last night of FD-133 (per the Bill Graham Foundation date pages and wolfgangs, which bracket FD-133 Aug 16–18). Then the rooms went dark for a day — Monday the 19th was empty at Fillmore West, and the Grateful Dead would not open BG-133's third bracket until Tuesday the 20th, outside this week's frame.

It is worth pausing on what the single BG-133 sheet had done: one poster, one card on the wall, had carried The Who, Creedence, the Dead, and Quicksilver across nearly two weeks and four separate engagements. The 18th was the quiet hinge in the middle of it — the end of Creedence's nights, before the room reset for the Dead.

(No verifiable SF ballroom event on August 18 in 1965, 1966, 1967, or 1969: 1965 predates the scene; 1966's runs ended the 13th and the next began the 19th; 1967's next runs — FD-76 and BG-78 — started mid-week but were not swept to closure this run and remain an honest gap; 1969's Woodstock had ended that morning and BG-187 closed the 17th.)