cocktail type foods
Dakota could still probably help you. I would say Hugh's Wine Celler, but I believe that is long gone. Sorry, my northshore days are a bit dated.
Also, try the Lakehouse in Mandeville. The owner, Cayman Sinclair, used to work at Dakota and I bet he could help you out. He has many years of catering experience. I've eaten at the Lakehouse once and it was very good.