how to throw a good house party?!

first you need good music. make that a priority, and good food/ drinks because no one likes a party with no music food or drinks. Also just tell the girls that they can each bring one or two of their friends (who are girls.) That way if some don't bring friends and other bring two, you should be good on the boy girl ratio.

the key to getting more people or girls in your case to come to a party is to tell them to tell there friend's and there friend's friend's to bring people.......and have good music like a small dj or good mix cd's..playing all night....maybe a nice small buffet of finger snack's..and drinks..you can also have a strob light and black light and decorate the whole house in white white streamer's,baloon's,table clothe's etc..white comes out nice under a blacklight...you can also have glowstix and your self where a white T and have everyone sighn it with glow in the dark marker as well.....you can do dance off's girl-girl dance off(you'll love..lol.) and guy-guy dance off with small prize's and whatever .......juss have the music,food and people and the rest will work it self out.....trust....good luck and happy early bday....

hey its simple...........u said u already have 20 girls ask them to call their female party, girls will definitely come to enjoy the party man...

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the one thing that makes a party good is girls. so tell those 20 girls u invited to bring all their girl friends. also have loud music