I actually have wondered about this topic before.
For example, one of the greatest (if controversial) delicacies in the world is shark fin soup. Shark fin is expensive, of course, due to the risks involved in commercial fishing, the increasing rarity of certain shark species, government regulations, etc. Due to the factors of the profit motive and shady government-corporate practices, the practice of shark finning (i.e. catching sharks only to cut off their fins and then releasing them back into the water, rather than selling the entire shark for consumption, fin included) has endangered the shark population in ways that are unprecedented.
So, in a socialist society, if one wanted to eat shark fin soup (and I do recommend that everyone try it just once), you would have two options.
You could either obtain a fishing boat, get some friends, and go fishing for sharks (and why wouldn't you? Fishing is quite enjoyable). You could then take the fin this way, and bring the shark back to the local commune to feed family and friends.
OR
You could wait for special occasions, perhaps certain holidays, where the commune may decide to have fancy dishes like shark fin soup during a communal feast. You know, in between the holiday games and the communal fucking.
"I've never read Marx's Capital, but I've got the marks of capital all over my body." -Big Bill Haywood
"...Experience declares that man is the only animal which devours his own kind, for I can apply no milder term to the governments of Europe, and to the general prey of the rich on the poor."- Thomas Jefferson
-=UTOPIA IS THE MORAL RIGHT OF HUMANITY=-