Pig roasts are fairly traditional in England - the mediaeval banquet menu does cater for vegetarians, though I can understand that they might not want to attend an event which involves singing the Boar's Head Carol as the pig's head is borne on a salver to the top table.

The big attractions of the Wareham (relocated to Verwood) Wail are the high standard of unaccompanied singing and the lovely rural Dorset setting.

Kitty