I usually work 7 days a week, but
very casually. Basically work takes a back seat to most other things (hanging out with my kids, gym, etc.). I get to hang out with my kids a solid amount every single day (not just weekends), which I love. It's totally worth giving up large blocks of non-work (weekends) for me.
It all just depends on what works for you, your employer / client(s), and even then it varies over time. Some time soon my kids may not want to hang out with me as much, and I'll tweak my schedule.
It feels sort of like being retired, but I'm still putting in close to a full work week of hours (and those are productive hours generally).