“Grease” (1978): Danny (John Travolta) and Sandy (Olivia Newton-John) come from very different backgrounds, but they enjoyed a summer romance before unexpectedly reuniting at school, duetting on “Summer Nights,” where they share very different memories about the quotient. Romantic. of what happened between them. Complications, breakups, and reconciliations follow, of course, but oh, those summer nights.
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Updated at 11:30 am ET, Saturday July 2, 2022