Refresher/Legends

A Refresher was a room with a full recycling shower (or possibly a Sonic Shower), sink, and toilet. They came in various configurations, from small  'freshers for starships, to large ornate rooms in private residences.

Behind the scenes
Refreshers don't appear in the appartments visited and explored in games such as Knights of the Old Republic. This is of course game mechanics (generally toilets don't appear in computer games where they are expected) but also we can guess that there are other ways to resolve that issue, like for example a public place the residents can visit, not visited in the games.