Begging

When they are having their coffee and biscuits, stay close. Gobble the dog biscuit they give you instantly, and then stare. Don't blink. Just stare mournfully and hopefully. If that does not work, lift a paw and touch their leg lightly. Repeat. The last resort is to put your head on their knee, and keep staring at their face. I guaranee that eventually you will get a bite of a biscuit.