Are pot-luck dinners really a disguised form of socialism?

Everyone is compelled to bring a dish – some fancier that took more effort to prepare, some very basic – and it is shared by all regardless of need. Everyone has a right to take from anyone else’s prepared dish.

By each attendee bring a dish, the cost for food (per meal) is brought down, on average.

Is this a simple example of socialism? The community benefits but the individual’s contribution is masked.