What is the appropriate spending the night etiquette in a hookup situation?

I recognize that every hookup situation is different and has unique circumstances, but I am interested to hear what the default situation is, and what factors affect this:

Suppose you are having a casual hookup relationship, or are in early-stage dating and it’s not particularly serious (maybe not serious yet, or maybe it will never get there, but you have no way to know). Maybe the hooking up involves sex, or maybe you’re just standing on one of the bases.

Is it expected that post-hookup, you will sleep over, or do you default to going home unless you’re explicitly invited to spend the night? Whatever your expectation, how would you react if someone did the opposite (e.g., you expect someone to stay over and s/he leaves, or you expect someone to leave and s/he stays over)?