en Cuevana 3. “We wanted to end up where we started,” said Charlotte Caffey, and what she meant was Los Angeles. That’s the city in which Caffey and her bandmates formed the Go-Go’s in 1978, and it’s the place they returned Tuesday night for the final show of a month-long farewell tour at The Greek. True to the economical spirit of the music, the Go-Go’s didn’t drag out this goodbye with long speeches or a corny video montage. From the band’s opener, “Vacation,” to its closer, “Head Over Heels,” it was onstage for less than 90 minutes — and that included two encores.