Why not add a bit of interest, by putting a lottery ticket in an envelope with the guests name on as a table name setting and also as a favour.
It could be the best £1 you ever spend on guests, especially if they win!.
It is fun, easy, and reasonably priced. Your DJ could always call the numbers out at the evening reception. I suggest you also name the lottery tickets in case someone misplaces a winning ticket.
Have fun finishing your christmas shopping, and if your getting married over Christmas, we wish you all the best!