Where are you from?
A NZ Christmas in the north island is dominated by a backdrop of the Pohutukawa tree (also known as the NZ Christmas tree). It wouldn't be Christmas, if it wasn't heralded by the scarlet red blossoms of the NZ Christmas tree everywhere you turn. Botanic name Metrosideros excelsa.
You could make a fake beach with backdrop of pohutukawa and bright lights. Put on your 'togs', your best rubber 'jandals' and fire up a BBQ with steaks and lamb chops and lots of tomato sauce.
Eat some strawberries and say things like "Jeeez Wayne, ya girl's blouse, whad are you drinking that yank Budweiser shite for. If you want to get on the piss like a real bloke, grab a tin outta the chilly bin."