It's actually SIPC - the Securities Investor Protection Corporation, so there aren't any abbreviation problems.

FWIW, there are atheist groups that serve similar functions. A friend of mine grew up going to the local "Secular Circle" every Sunday, because her parents wanted her to have the social benefits of church without any of the religious stuff, and she talks about how she intends to bring her kids there.

It's "Tea-flings" :)