How optimistic of you to assume that you wouldn't just spend another eight or nine hours at your job because if you don't your coworkers will and you'll get fired.

Caloric requirements are higher for someone awake than someone asleep. If the cap allows someone to operate with 20% less sleep you could imagine a small expansion of hours for shopping, venues, restaurants etc, I’d the cap allows for an 80% reduction of sleep the morning bird and night owl crowd would essentially overlap for the majority of the population, and I can imagine morning workout routines that involve dancing at dance clubs that haven’t been closed yet.