There is no limit as to the amount of interesting ways a single person or a couple or just a couple friends can mess around with people in any one particular social setting. As a sociology student, I took everything very seriously. I still do. You simply choose a role, play that role, and then document the reactions of those around you mentally. If you want, you can document literally everything you see through observation. There is no more interesting animal than man. We are all limited in our own personal ways. The key is to use what you consider a limitation and turn it into your advantage. The problem with all this experimentation and response documentation is that this kind of thing is often used for evil purposes. It's hard to spot a good "con," but really... it's not.