Are casual hookups as easy as what you see in the movies? This scene from “Knocked Up” with Katherine Heigl and Seth Rogen is a classic, and for most of us also very familiar. That’s basically why people go to bars. Men and women are there to have a good time, and the oh-so-important ingredient of alcohol is present as well. Add in a dance floor and all of a sudden you have the perfect environment for quick hookups. Rogan’s character in this movie is a complete dork, but he’s also funny, and he’s even funnier when Heigl’s character is drinking shots. Of course in real life his conquest might not have been quite that hot, but it can happen.