[SamAdams76]

You are right, this is the book. It does end with "We blew it! We blew it! We blew it!" This was when Kesey and the Pranksters realized that they were irrelevant and yesterday's news. They had just been forced out of having their "Graduation Test" at Winterland by Bill Graham (the rock promoter) and had it in some sleazy, filthy warehouse instead, in which only a few hundred showed up, most of whom left in disgust before the night was over.

[weegee]

You can see footage of the "Acid Test Graduation" in the movie, The Hippie Revolt (it is now on DVD):