Oh wait, are you a single woman? Then here is my advice for you:
Swingers have very hot /cold attitudes towards the single woman. Some couples are only looking for a single woman for a threesome and so they will be crazy about you. Other couples see the single woman as the lone wolf who can cause real trouble for their relationship and so they will avoid you.
Sometimes lesbians show up at swinging parties and are only there to eat some pussy. These girls are very unpopular since they unbalance the mix by removing other woman from the pool. So don't just think that because you are a hot single female that you'll be the belle of the ball. Show some humility and some cool poise.
As my advice before to men, move around the room early on and introduce yourself in as friendly and neutral manner as you can. DON'T GET DRUNK. I've seen nervous girls get drunk, get their pussies blasted by totally selfish and insensitive jerks, then run out of the party barfing on the ground outside. Wonder how their self esteem feels after that?
Don't be afraid of being pushed into something against your will. If this is a true swinger party then no-one will push you into anything. You are in the driver's seat. The only person who can do bad things to you is yourself, by making bad decisions. Everyone there at the party will support you if you want something to stop.
Don't be shallow. You will know in seconds who are the people you find physically attractive, but take the time to learn their personalities. Who's sexier? People with perfect bodies who don't give a damn about you or ordinary people with normal flaws who make you cum 7 times? Do your first go round and check everyone out, then spend some more time with the people who make it to your short list.
Don't be submissive and cower in a corner waiting for the perfect experience to seek you out. The most aggressive people at the party are usually not the best ones for you. So get proactive and move about.
So now you've picked out the couple or couples you want to play with. They may be newbies who are just there to watch, or get horny for each other, or do some crazy soft swinging nonsense. If they are newbies then that is a serious strike against them no matter how well you relate with them. Consider finding a couple with more experience.
So now you've found a couple and they are eager to negotiate some action with you. Don't be a tease! Swingers fuck, they fuck people they've just met. They spread their legs and allow tongues and covered cocks into their pussies. They have low opinions of girls who show up at private house parties encumbered by mental chastity belts. If you go off to a bedroom with a couple then be prepared to go all the way. You're not a teenage girl in a parked car, so don't make mistakes like one.
My partner's favorite swinging move is something we call the "lick and stick." That's where she has a cock in her pussy while a bi girl licks her clit. You should definitely go for the lick and stick. Also the one cock in the pussy and another in the mouth combo is a favorite with most swinging women, so try and give that one a try as well.
In summing up: the seeds of friendship you plant early in the evening will bear rich fruit later on. Be cool, be choosey, make a deal with your little head that your big head is in charge of the negotiating. Don't jump into something too fast that you will soon regret.
Look for people who are caring, sensitive and who can listen to your body. If you think rough aggression is sexy then find a partner to treat you that way in private. Because a woman being treated roughly in public is a very unpleasant thing to see. Be prepared to go all the way, you're at the steak house, don't be a vegetarian.
And of course good luck!