How do you have a good house party?!

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I have hosted a lot of party's in my life. When I had a lot of money I kept a stocked bar. However times ar hard so BYOB is good.
Everyone loves my party's and my secret is good food, and a mixture when it comes to the guest.
I like to mix professionals white blue collars. People with interesting jobs, or life styles.
Your guest will entertain each other if you spend some think about the people you are inviting.
I think music should be in background.

Don't buy any alcohol other than for yourself and you wont have to buy that much people will bring some for you, but make sure to tell them to BYOB...

don't just fling the telly on with a music channel, shy people will sit and stare at it and people will argue over songs. look at all the people going and then make a play list on itunes that will fit the majority of tastes.

have plenty of biscuits and before the party gets proper started ask if anyone wants tea, its a winner i love tea at house parties! wait until a couple of hours in before you start taking pictures that way they will be half cut and you will get better pictures and save some memory for anyone in a state. meet and greet everyone since your the host and ask if they want anything..be dominant and if anyone takes the piss dont be scared to tell them to **** off (:

good luck and enjoy your party

plenty of experience

The only time I have ever provided the alcohol for a house party if I was throwing a keg party with one keg and at least 30 people. I recommend one big bottle of some flavored rum or something you can make shots or shooters with and a case or two of beer for people who just show up without anything.
Clean your house. Take all the trash out because your trash cans are going to fill up. Make sure there is plenty of toilet paper in the bathroom! Put away anything you don't want broken. Put away all your clutter, books, magazines, because you will need table space for people to set their bags and drinks down.
Get some snacks like cheese and crackers or chips and dip for when people are hungry or they will do weird things like cook all the mac and cheese in your house in one big pot and you will wake up the next morning going WTF happened to my kitchen?!

Lots of house parties.

BYOB is the way to go for alcohol.

My only other tip...see if someone else is dumb enough to have this many drunk people in their house, instead. It's guaranteed you'll have 5 more upholstery/carpet stains, one expensive item broken and a weeks worth of garbage randomly placed about your house. I almost forgot, you'll also have at least one idiotic chick puking in your main bathroom half the night...I recommend having two toilets available.

Have had lots of house party's.

welll . im guessing this isnt a teen party or there would be more then 15 people . beer would be good . dont forget the liqour . get a dark one and a light one . and juice to mix it in ! . a cook out would be great ! or a pot luck dinner . a big group game would be fun as well . or just loud music .

get some hot music... bring the house music! (calvin harris, guetta etc.)
tell people to bring their own drinks... but supply some yourself! get some good speakers too... and neon/laserish lights + smoke machine!

Put on the Ritz! Tell them to BYOA! You provide the food, atmosphere and music!

Have a good time!