Earlier quoted context omitted.
I'm a father of two and a startup founder. I like Detroit techno, and all relevant events _begin_ at 1 AM. The solution isn't a startup, the solution is techno parties that start at 9 PM.
In The Netherlands some (not all, but a decent chunk) techno events have moved from a 21:00-07:00ish to a 12:00-01:00ish timetable. It works out quite lovely because one can attend without completely messing up their daily rhythm. And if you do like to burn the midnight oil there’s always the afterparty/ies :)
I wish all of Europe had English pub/club opening hours. I mean it's not like the English party (or drink) less than us here on the continent. They just start earlier. That makes a lot of sense!
In hindsight I was jetlagged twice a week just by moving forward and back my biorhythm every weekend, during much of my youth. That was unhealthy and totally unnecessary if only party times were more sane.