> Putnam and Murray suppose that the social institutions and conventions of 1910-1940 were a platonic ideal and therefore ignore the myriad of new ways that people socialize and engage in their communities.

Are the new ways the same though? Not all social experiences are equal.

I'd say bowling offers a much richer social experience than getting coffee or going to a hacker space. There is direct competition, there is teamwork, commitment and the comradery that comes with it, there are winner and losers, good days and bad days, etc. With bowling or church you will also be interacting with a much wider range of the community, it's a much less self selecting group.