Liberty (Falwell's college) gave us these little religious sheets at a tourney when we asked to use the bathroom on their air-conditioned bus. (I know sounds strange, but our game was outside the complex and no bathrooms.)
When we visited the campus, I won't go into all the attempts at conversion. We thought it funny and kept saying what our religion was (some Methodist, some Catholic, a Lutheran) and that we were already Christian. They still wanted us to convert.
I find the invite to a prayer circle very insulting, being in a neighborhood of multi religions. I keep my religion to myself. Keep yours to yourselves. If we want to do a prayer circle, we can do our own.
If you are a christian how could you call any prayer an insult? The answer is you couldn't and you aren't.