Talking to NPCs and running around takes no energy, and the only way bedtime effects energy level is if you stay up past (I think) midnight.

Plus, almost all the townsfolk are in the bar in the evenings.

It’s pretty obviously set up so that you run arpund talking to people once your energy gets too low to work.

Lastly, that “talk to everyone” quest doesn’t gate any gameplay content, only social scene content with the people you don’t talk to.