Good manners will open many doors in life, even those that stay closed after the best pick up lines. Manners are often missing in the modern world, where being rushed and short on time is an epidemic. Manners show respect and good breeding though, and will open up many opportunities that would remain closed otherwise. When you are polite, respectful, and use good manners few people will be able to resist you, and few doors will stay closed. Pick up lines, even the best of them, are insincere and often cheesy or smarmy as well. This does not make a favorable first impression and could actually turn away the person that you are trying to attract. Great manners will always make an excellent first impression whether you are meeting a neighbor or the Queen of England.
Anyone who has good manners will be seen as someone who is mature, polite, respectful, and responsible. All of these are traits to be admired and emulated, and they will help you enlarge your social circle regardless of your income or celebrity status. If you want to get the attention of someone you could try a pick up line but this is not the best move. Instead of trying to pick them up with a fake line why not be real and honest, using good manners to impress them and make them want to get to know you better? This is far more effective, and the first impression that you make will last much longer.