We do see "Bring a plate" on generally advertised invitations - such
as street parties.

On Tue, 07 Sep 2004 20:45:35 +0100, Kate Dicey
> wrote:

>Richard Wright wrote:
>
>> On 6 Sep 2004 23:09:47 -0700, (Barry Popik) wrote:
>>
>> <snipped>
>>
>>>Pitch-in: A gathering where everyone contributes a dish to eat, known
>>>by the rest of the English-speaking world as a potluck.
>>
>>
>> Are you sure about the rest of the English-speaking world? I'm from
>> England and Aus and don't sense this meaning in potluck.
>>
>> Nor does OED. "One's luck or chance as to what may be in the pot, i.e.
>> cooked for a meal: used in reference to a person accepting another's
>> hospitality at a meal without any special preparation having been made
>> for him; chiefly in phr. to take pot-luck."
>>
>> That's almost the opposite of pitch-in.
>
>That's the meaning I know here in the UK too. We don't seem to have a
>special name for those occasions when you all donate a food item. This
>is possible because contribution lead entertaining is relatively
>uncommon except for special occasions like the school Christmas party,
>street parties for royal occasions, and the like.