If you are constantly getting turned down for dates, you are doing something wrong - probably approaching the wrong kind of people in the first place. Instead of looking for the super hot chick at the bar and then using cheesy pickup lines, why don't you seek out people who share your same interests, even if they don't seem like "your type". Most times you'll find their company vastly more enjoyable than the hot bar chick and you also won't have to pretend to be something you're not.