I have a friend I meet up with roughly once a year, and last year I joined a few Kajsa rides, but other than that, almost exclusively alone. I don't think I've ever taken part in anything that might be described as a club ride.
This may seem like the ultimate heresy, but...I really don't enjoy café stops, and for most groups these seem to be de rigueur. An unnecessary waste of precious cycling time.
I've done a few Audaxes, but they seem to involve riding alone most of the time with enforced café stops. The attractions lie elsewhere - locking horns with someone else's challenge for a change, and it's great to meet people along the way.
Having written this, I have a strong feeling I could be missing something, and perhaps I should put that right while there's still time.