hour and a half party. two hours tops

decorate with a theme relevant to the bridal couple.. funny and cute is good
prepare lovely finger food and a cake
greet the guests and introduce them to one another
play three or four short games like the ones up there,
give clever prizes
admire, talk about and eat the lovely food
open the gifts write down what they are and who gave them... so thank you notes are easy
say a gracious goodbye

It's an easy party to give, really