Try out this old school street hustler card trick. See if you can find where the queen is hiding, then see if you can perform the trick. It's a truly amazing card trick that will impress anyone, or enrage anyone (if money is involved). This hustling trick is known as the "three-card monte".
Fun Party Tricks provides tons of great howto videos for cool party tricks. These videos are free and easy magic tricks that allow you to show off your skills at a party or bar.