The speaker is trying to piece together a college memory and keeps losing the details. She isn't sure whether it was '67 or '68, can't recall the artist's name, and only later lands on "Maura." What she does remember is vivid: drinking Phil's beer, singing in the park until the cops came, a blacklight bathroom full of white plaster death masks.
The masks are the poem's strongest image. Made while everyone was "still alive," they hint at mortality, yet the speaker now wants one, "that plain white." She also remembers the trust it took to let someone cover your face so you could breathe. That closeness contrasts with how easily she forgot a bridesmaid's name.
The tone is wry and wistful, with small jokes like the pregnant-looking empire waists. The ending is quiet and blunt. Being with old friends makes her suddenly realize that they are old. The mood is gentle, funny, and a little sad.