Atheist, married to a Buddhist. He prays daily and has his rituals.
Made it clear from the start that I'm ok with religion as long as they don't try to convert me or harm others.
Aside some dietary requirements, it works quite well. Married for 9 years now.
This works quite well for us, but results and experience may differ based on religion, patience and personal beliefs. I imagine I might have a hard time dating a religious zealot though.
At least we have contemplated the worst case scenarios ๐