One way to hold this word is to hear it as the word go said twice, with no pause in between. Go and go again: nobody stops, nobody sits down, and the energy keeps climbing. That is a club at one in the morning with the band still playing, and it is also a year when rents, prices and pay all keep rising. The word never describes something at rest. It describes something that has not stopped yet.
From the word’s history
The supplied source dates the word to 1964 in the US and gives it two strands at once: the nightclub name Whisky a Go Go (itself from French a gogo, meaning in abundance), and simple reduplication of go, from the 1962 slang the go meaning in motion or in fashion, as in on the go. Both strands say the same thing about the word, which is why everything it describes is moving fast.
手上的字源資料把這個字定在 1964 年的美國，而且給了它兩條同時存在的線索：一是夜店名 Whisky a Go Go（店名又來自法文 à gogo，「多得不得了」），二是單純把 go 疊起來用，來自 1962 年的俚語 the go（正在動、正流行），就像 on the go 那樣。兩條線索講的是同一件事，這也說明為什麼它形容的東西都在快速地動。
Wiktionary, "go-go"
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