You convince a girl via text messages that you're out at the bar getting after it, but really you are at home not even drinking.
You convince a girl via text messages that you're out at the bar getting after it, and both of you can meet up later. She thinks you're getting drunk, but really you're at home. You convince her to meet you at your place after you supposedly are done drinking. Before she gets there you slam 2 or 3 beers and pour a little on your shirt for the smell effect. Then when she arrives you've saved yourself the trouble of going out, saved yourself the money, and you have the competitive advantage, and are likelier to get laid. When you brag to your buddies the next day, you tell them that you pulled the houdini.