It’s a fancy showroom, not a car lot. You can’t drive off in one of the products unless you want to make a grand exit through the plate glass windows. Singapore car registration costs as much as the car itself and all they’d do is get you started on the paperwork.
I think they can do the paperwork pretty quickly. And I'm reasonably sure they let you do test drives.
Just need to make sure that the driving customer has the beer after their test drive. You can fill up the companions before, however.
But to strengthen your point: I don't know for sure, but from what I can tell by looking at the place there's barely enough inventory at that showroom to allow some test drives. It's definitely not a car lot.
Aha, I'm not entirely sure what a "car lot" is, but the showrooms from BYD and other car makers here in Spain definitively let you test drive cars there, although you won't buy a car and drive away from it there. Apparently it works differently in Singapore :)