Churches have a weird entry criteria - you have to believe in their god (which can be offensive when it’s phrased like “you are incapable of handling your own life, leave it to God”). And if you don’t, you’re silently and persistently pressured into making that conversion, with a healthy dose of pity for you and your sinful ways.
But, yes, people will often discuss theology and proselytize. If that sort of thing angers you, maybe skip out after the music and then catch up with folks when the coffee or potluck starts. Or maybe skip all of the above and just sign up for the volunteer activities at retirement homes, women's shelters, etc.
Communion at the Catholic Church. Or entering the Mormon church at all.
I guess maybe wedding might be a niche concern. Some churches only marry believers or even members, but I bet most would consider it anyway. Only some sort of premarital class or counseling is typically required.