My suggestion is to talk to the fathers who show up. Many times the moms ignore us or act funny around the fathers. Just talk to the dads and remember that they are there because they are trying to be good dads and to bond with their children.
While some of our experiences are going to naturally be different we have a lot in common. We still need to feed/clothe/entertain/discipline our children. Focus on the commonalities and things should progress from there.