jacket potatoes, just keep them wrapped in tin foil till served shoiuld keep them hot, perhaps a big pot of chilli or chicken curry and then do the buffet as normal making a selection of salads, cold meat platters, chips, dips and animals wrapped in pastry :-). or why not let someone do the catering for you and suprise your guests witha fish and chip supper. Order ahead at your local chippy of 70 lots of fish, chips and mushy peas and ask them to deliver.