Anyone know if an international business (Z) class ticket gives you access to the SkyClub lounge?

On Delta's website, under "Onboard Experience" (http://www.delta.com/content/www/en_...xperience.html), if you look at the Delta One section it mentions lounge access, but under First/Business not such mention is made.

I called Delta's customer service and the attendant seemed unsure and at first said "access to SkyClub lounge always requires a fee". Then, when I asked him if certain fare class granted complimentary access, he came back saying that my Business (Z) did not. I'm not completely convinced he knew what he was talking about.

Can anyone confirm? My itinerary is:

SFO-ATL (first class-P) - domestic
ATL-MCO (first class-P) - domestic
MCO-BSB (business-Z) - international

Thanks!