Weeeelllll....as far as I have noticed, the Sector can be broken up into a few parts.
The three biggies being...
the Status Bar (Kareoke!!!)
the Savannah (where chocolate can buy your safety
)
The Game Grid
I have always imagined the Status Bar as looking like your local neighborhood sports bar and grill, with various memorabilia decorating the walls (Old discs, lightcycle rods and such)
The Savannah looks a bit like the area where the MCP was, just a bit smaller maybe...and prettier.
The Game Grid looks like...well...the Game Grid (Again, maybe a bit smaller)
I hope that helps a little