The religious aspect is really downplayed, and the most religious parts are optional. Yes, a priest is there, and does some presenting, but not really from a religious point of view. The religion that does come in is really values that most of us hold, whether due to religion, or jsut becuase they are "right".
I wouldn't worry about the post sessions yet, if he goes, and thinks it was useful, he'll make the time for them. My W didn't, but that's her, not him.
