I guess you would say I too am all in. President of a fishing club, treasurer of a casting club, FFF CI. I own a summer cottage where I am past pres. and current treasurer of the cottagers' association. However, when younger it was tennis, then wilderness camping where there is not much time to fish, skiing, plus drumming and music full time. And of course there was raising a family when everything was viewed from that perspective. I guess I am justan ?all in? type of guy.
So my point is twofold. Everyone is 'all in' to one or a few things at any given time, and that changes over the years (and with accumulated years). Some people are more 'all in' including social groups and organizations, and some are just quietly 'all in' enjoying hobbies and interests on their own. I think the stage of life and your activity level have a lot to do it.
Now back to planning the next fly tying meeting.