I don't think that quote's in Space Ritual, although it's a long time since I heard it. It is in The Revolution of Everyday Life; it's part of a quote from a Russian writer called Rozanov, which Vaneigem says is 'the best definition of nihilism'.

The show is over. The audience get up to leave their seats. Time to collect their coats and go home. They turn round... No more coats and no more home.

Reminds me of that essential distillation of phenomenological existentialism by one P. McCartney:

And, though she feels as if she's in a play,
She is anyway...