That "Freedom from Religion Foundation"! Yeah, those clowns! Now they're suing the Cranston, RI flower shop that denied the sale of flowers to - guess who - Mizz Jessica "I don't like your half-century-old prayer banner, so it has to come down" Ahlquist. Why did said flower shop deny Miz Ahlquist? Simple! Because she (with the help of her daddy, and the ACLU, and the FFRF) successfully sued Cranston West High School to have a beautiful prayer banner removed, that was written by a CWHS student (or is it CHSW, Cranston High School West? but nonetheless...) over fifty years ago.
Hint: Private businesses have the right to deny service to whoever they please.
The Freedom from Religion Foundation doesn't have a case. Nor a prayer. Literally!