The sort of organization you're aspiring to certainly has its merits, but it's not legal in the US in practice because it has the potential to cause discriminat

The sort of organization you're aspiring to certainly has its merits, but it's not legal in the US in practice because it has the potential to cause discrimination in things like promotion on the basis of nonparticipation, and attempts to achieve it by filtering your hires for culture fit are explicitly, over-the-top illegal - well beyond 'awkward'. Woe unto your career if you ever try to start a family, or get injured ziplining, or develop liver disease, or anything else that would keep you out of the good graces of mandatory-after-hours group events.