What's great about this is to think about the operating system that they have.
Each table is a siding off the mainline and the drinks are delivered to a table via that siding. While it's nice to see the trains coursing around the mainline, I think it would be very interesting to see exactly how they direct the trains to their final destinations. It's not clear whether they have a central dispatcher running everything, or whether it's done by software (e.g., the bartender manipulates controls to indicate that a given load should end up on Siding #7 and then sends the train on its way).
If it's the latter, I'd love to see the programming involved.
SJS