In ANH the location made sense. Ben is both drawing away the troops but also introducing Son to Father in a twisted sort of way.
In ESB the location made sense as an extension of the industrial purpose of Cloud City.
ROTJ is where it begins to go a bit wrong with the inexplicable doom pit but generally it works as a temporary throne room. A viewing arena for the end of the Rebellion and the hand over of the old apprentice to the new.
TPM it made very little sense that the high-tech sparkly glow pole factory exists as an extension of the hyper-renaissance style palace. It looked more like the interior of a giant space ship than a massive power station on Naboo, This is compounded by the lack of any staff or droids running the place. Bespin was in the process of evacuation through most of the ESB duel and the central vent was vast so it was plausible we didn't see anyone working that space (either because they have run away or because they were too small in comparison to the vent) but if the Naboo power station is as active as the sparky things suggest, shouldn't something be running the place? The Federation has taken over but they have millions of droids. It just seems like a set up for a dance scene in a musical with three guys flipping around inside a disco out of hours.
The bulk of Star Wars duels is (as said earlier) banter being thrown around more than weight. At no point do the Jedi try and get any information out of the guy yet they are there to investigate him under orders from the council in the interest of the chancellor and the senate?
Why?
None of the PT duels make much sense but TPM duel illustrates the whole problem with the PT. It's there because it can be, not because it needs to be.
