Decorate the room with balloons, and perhaps crêpe paper streamers.
Upon arriving give every guest a crêpe paper cap to which he may attach
a balloon for decoration. Give balloons as prizes for each game. All
the balloons which are used as prizes may be effectively used as a
central decoration in some such way as follows. Have a large barrel
hoop, bound with crêpe paper, suspended from the ceiling in the center
of the room. To this attach by strings dozens of colored balloons. When
a person wins a balloon, give him one of these at once or wait until
all the games are over and the final score is taken and then present
the balloons as a final ceremony.