My grandparents just bumped their volunteering from weekends to weekdays. Then my Boomer parents switched to leisure activities and travel (they stopped volunteering when they retired). I prefer my grandparent's retirement, but now that NGOs got professionalized and became extremely political that is a no-go for me. I didn't like to be bossed around by a 30yo narcissist driven by maxing out his EOY presentation (to keep their comfy job).

I'm considering to retire in a small town where distant relatives live and hopefully get busy by volunteering there somehow. But it's never that simple.