It will be easy to call it something that prompts the nickname “Disco Car”
BG, Summer, Club, Discover, DJ…

When we finally have self driving cars, you’ll still need seat and seatbelts, but otherwise the interior can be in any format you choose. I’m thinking seats that face each over like in some limos. With TV screens and speakers wherever you want. Possibly the screens can be detached easily and relocated.

Tinted windows (no windows?). A drink fridge. LED lights that can do anything. And a booming top-level sound system.

None of these force you to party, but the option is there. First mover advantage and a limited market, means a single brand can own the space if the get it right. And rappers et al will give it all the marketing it needs for free.