I like the idea of practicing on the roof. That way, if they corner you, you can always jump.
Seriously though, I sometimes wonder if I, or some of you, live in an alternate universe. How the heck are you supposed to practice effectively in a car? What sort of hotel let's you practice on the roof - and do the guests shout out requests for "Melancholy Baby" from the parking lot? What does it mean for a quartet of instrumentalists to rehearse at "room level" in a hotel room without disturbing others? And how can a TV that's loud enough to drown out a sax not drive others to distraction?
Here's hoping I don't cross paths with some of you on my next hotel stay.
It depends on what kind of car you have, how badly you "must practice" and what horn you are practicing. Full sized vans are the most comfortable but it's possible in many cars.
I don't think any hotel in the U.S. would give you access to the roof. I don't get that either. I seriously doubt they would let you use a conference room. Maybe if you paid for it's use.
There is no way you can rehearse in a hotel room without making someone horribly annoyed. Even if you are good enough to be considered the second coming of Coltrane, you have made someone hate saxophones. If I can hear the couple in the next room quietly going at it all night long, a saxophone would be insane.
T.V.'s played at normal levels can sometimes be super annoying in the next room. I can't imagine doubling the annoyance with a saxophone on top of it. Of course if you are at a top of the line hotel where the walls, floors and ceilings are nice, thick cement the whole argument is moot.