Eh, that class wont do ANYTHING for you at all. It is for the Mom and teaching her how to teach the baby to take the nipple and placement of such. It is not going to be talk or practice about boobies that will be any fun for you AT ALL! If your wife is able to breast feed and I hope she is (most healthy option for baby and saves you TONS of cash) will be totally on her. She will also need to pump and freeze so the baby can eat while she is away as well. I didnt get to feed Liam till he was like 3 months old and Mommy was back to work. LOL... Could we be more off topic?
Anyway, if supporting her is what she is looking for then go. If it doesnt matter to her whether you show or not, skip it!