Wow! I live in the States. The most we did was the national anthem and most people consider that more patriotic than religious. Some teachers would speak of religion if it came out in conversation, but that's it.
I had to attend school with my daughters for a few weeks last year because of truancy problems. Religion was brought up a few times, but it was all initiated by the students.

I wouldn't be offended by seeing the Bible in an office. In that case, no one makes you read it. It's just there for those who are interested or to help kill time.
I identify with Christianity, but I WOULD be offended by being made to sing hymns and such. There are so many different denominations of Christianity. Just because you're one or another branch doesn't mean you agree with what's being taught by one or the other (Catholics don't agree with Baptists, for instance).

Maybe you're just in a bad location.
Then again, I grew up in the "Bible Belt" lol and I didn't have to deal with such things