a) I run my own business, and don't have a "manager."
b) encouraging religion in the workplace is ridiculous -- and it's not "in line with democratic values."
c) if someone wants to do that, they can. If they encourage employees to practice any religion, they're acting unconstitutionally; if they discriminate against any religion, they're acting unconstitutionally. There's a very small area where their actions would be fully legal, and that area is very easy to get out of, which is why few companies would ever do any such thing -- lawsuits would be inevitable.