waiting for a table at a busy bar

It was surprisingly busy at the bar during dinnertime. Which means it was also busy at the tables, which means people had to wait for tables at the bar. So three people come and take up 3 bar stools and sit and chat as they wait for their table, and don't order any drinks. People are trying to order drinks from me AROUND them. Please, be aware of your surroundings and realize that you are in the way?