How do you share the sweet spot?

 My 2.1 set up  only pleasures me when i sit or walk in the sweet zone. If I have guests over, I dislike sharing my position so they can experience the sound stage.  Is there anything one can do to share the sweet spot? Is a 4.1 or 4.2 set up the solution? Does the speaker, gear, position and set up dictate overall experience?(I'm sure it does)
How do you guys share the sweet spot? 
Is it ok to be sweet spot selfish? I feel that being an "audiophile" is also sharing the experience. 
Your thoughts please. Thank You!