For three years I worked in a retail location that largely caters to the senior citizen crowd. When I first started working there I was confused as to how it could take some of the employees hours to stock just one isle. I quickly learned that it was because a lot of our regular customers had the tendency of stopping and talking to the employees for lengths of time without stopping or giving the employee time to do anything other than listen to whatever story they were telling. I eventually became very skilled at interrupting, without seeming like I was interrupting, so that I would actually be able to continue my work without getting stuck listening to one customer for an extended length of time.