The most important place in any house is the family dinner table. The most important place for the Christian is the place of prayer. The dinner table can teach us a lot about how to pray. Prayer is not formal but family talk.
Nobody comes to the dinner table with a formal speech to deliver.
It is a place to share common interests in an uninhibited and unrehearsed manner. So is prayer. Prayer is not disrespectful but reverent. At the dinner table we probably speak to our father in a way that is more respectful than the way we speak to brothers or sisters. So, when we speak to God, we should show respect and honour.