Preview: Here at my Marvel game
I often find that when setting up a game in a confined setting, it's best to make sure everyone is on the same page for how things are laid out/what they look like. Setting up a map of a setting (be it the school the whole game is set in or just your characters' apartment) can not only give the story a cohesive setting, but also give your SL partner more detail to write about instead of just staying vague.
One example of how this is working out is Here at my Marvel game. Another example of a smaller setting, just a character's flat, is Here. Neville's apartment. Call it shallow, but a lot of the first applicants to Progeny were drawn to look into the game further by the neat clickable map. Detail in your game concept shows dedication as a mod.
( Here's how )