I don't see Epicurean Friends listed in the USPTO database, but trademarking the name isn't a bad idea to preserve the identity. That being said, one has the responsibility to defend their own trademark. There's no trademark police.
I'm not a lawyer (and you are Cassius !), but I think you can use TM or SM (service mark) if you want to "plant a flag". The (R) is only legal once the trademark is actually registered.
For anyone interested, https://www.uspto.gov/trademarks/basics and https://www.uspto.gov/trademarks#trademarks-0 .
(I'm still curious about intellectual property as I was manager of the department that ran the Patent and Trademark Resource Center at my library)