Irish or Reverse Bingo
Sell everyone a bingo card, then call out a number. if that number is on the card, the person sits down. if its not on the card then they remain standing until only person remains. its makes a one off raffle a little more fun. ie reverse bingo.
place a bottle of somethig in the middle of the floor. get a line on the floor and everyone throws ten pences at it. the closest ten pence wins the bottle. dot make the mistake of 20 or 50 pences, 20 pences go everywhere! and 50 pences is over too quick and people are less inclined to change their loose chage into 50 pences but they will be willing to change all sorts ito a 10 pence.
for fun why ot download movie and tv themes and get people to shout out the names of them, this one is not for money but is an amazing 'ice breaker' for conversation.