What Your Guests Want We all want to enjoy ourselves when we go to a party or reception. Many times that includes libations. Most people don’t want to drive impaired, but when they do it’s usually out of ignorance. The number one excuse law enforcement officers get when they pull a driver over and their alcohol level is over the limit is, “I didn’t know I was that high.” Many people, if they’ve been drinking, would like to have a way to test themselves to determine if they’re safe to drive.