Am a fan of the Honda dealer theme: https://www.youtube.com/watch?v=7ewPzrHMdQs
Also GT4 has a remix of that song as Menu music https://www.youtube.com/watch?v=1hvH7VqSjuE
Ooooo Mazda dealer! https://www.youtube.com/watch?v=5GoQ2G5ZybA
For comparison's sake, this is the Japanese version of GT1's Honda dealership:
https://www.youtube.com/watch?v=R8RxTKKp9qI
At least this style remained for the menus in future games. Back when GT1 came out, this music provided the game with a completely different atmosphere from other contemporary racers. Several of the original dealership themes snuck their way into future games, like you showed haha.