No reason they can’t. Perhaps a church will get the idea to address atheists directly.
“Nice people will welcome you to sit in a warm and pretty church! Probably give you a snack, too!”
Great idea to include the “snack” part. LOL It’s sort of a rule in a Catholic and also Lutheran parish to provide food at pretty much every gathering. Not every Sunday but there are donut Sundays at least once a month and in some parishes there is coffee and snacks every Sunday. Fun.