When I went back to work my DP started going to MG in place of me. The girls welcomed him with open arms.
When they get a little older and start to socialise, MG isn't so much about the mums anymore, but more about providing a safe environment for kids to play and interact in.
Jenna would have greatly missed the time with her friends if Shane hadn't taken her.
As for the feeding thing - you will find that by a few months down the track, most women are pretty comfy about others seeing them feed. When a baby is hungry - you just gotta feed.

Its a massive support for you as well, you can discuss sleeping, eating, playing, development and with everyone bouncing ideas off each other it helps alot.