Even numbers are kinda the expectation in music, giving you a clean onbeat-offbeat-onbeat-offbeat tempo that keeps the whole thing nice and cyclical. Generally, any odd-beat tempo song is doing that on purpose for one reason or another- 3/4 time is known as “Waltz time” because the extra off beat lets dancers do a little flourish or something else interesting with the dance. One of the only songs I know in 5/4 time is, of all things [the mission impossible theme](https://youtu.be/XAYhNHhxN0A), though I’m not good enough at music theory to analyze how that helps the song capture the peculiar sound and vibe it does.
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