Back in the summer time when I had my LR already on order but thought about placing an order for a Perf, I went and test drove a Perf to see how that was. The guys at the Brea store had no problem if you took the LR out by yourself for a 30+ min test drive, but with the Perf they wanted a store employee sitting shotgun in the car and only allowed a 15 min test drive. Can't say I blame them since I'm sure people would probably just rip around in the Perf every single chance they got.
They did offer an "overnight test" with the LR, but I didn't want to take that home and bring it back the next morning when they opened up. They've offered me overnight test drives before, where I could take the demo car home in the afternoon (around 4 or 5pm) and would have to bring it back at 10am when they opened the next morning. Never found a convenient time to do it so I never took advantage of this, but that's what they've offered for me in the past.
I'm sure with demand being way up and inventory being very low (even their demo cars), they may not be offering this as much these days.