We belong to a very large parish in the deep South and there are tons of opportunities for “fellowship”.
There are coffee and cookies after the Saturday evening Masses: coffee, juice and donuts after each of the Sunday Masses: a Wednesday night dinner offered every week in the beautiful parish center (we had our daughter’s wedding reception there, they do the food so well): the opportunity for lunch there every day at minimal cost: Friday Lenten fish frys: parish picnic: Bible Studies: youth groups, women’s groups, men’s groups, seniors’ groups… you name it.
We’ve made some of our very best friends through the parish (been there 28 years) and have belonged to a supper club consisting of parish couples for close to 20 years.
I don’t know if this is unusual for Catholic parishes or not, but we belonged to a parish in Virginia many years ago (early '80s) and there was quite a lot going on there, as well.
I think it is most helpful to be able to get to know and form friendships with fellow Catholics; we find it is a very comforting to have a built-in support system of people who share our faith. These days, heaven knows we need it.