What an auspicious and coincidental question you should ask!
Why, just the other day, I found myself looking at disco balls, and lamenting the mundane rotation options offered commercially. They're all hung from a chain or cable or something, restricting them to a purely plumb axis.
"Wouldn't it be cool", I thought to myself, "if you could build a disco-ball orrery, able to send one or more disco balls orbiting around the dance ceiling with their axes not normal to the ecliptic plane?" 
(It's not the first time I've asked myself something completely whack-ass, and I doubt it'll be the last.)
-Nate B-
Liz  wrote:
>                               Wassail!
>     
>     At my local space CHAMP, we    participate in a monthly downtown City arts event. Each event has a    theme, with September's theme being "Disco". We build (hack      together) things to go with the theme. 
>     However, we are not quite sure what to do for next month and  I was    wondering if any of you had any disco theme projects or ideas that    we could use? :)
>     
>     
>     ~
>     Liz
>     
>                   