I was thinking about the dinner scene on Cloud City. It’s a great, iconic scene - Han and Leia casually walk into the dining room, believing everything is okay, only to see Vader just sitting there at the head of the table.
But like… it’s one of those things that makes very little sense if you think about it. What was the point of staging the dinner? Why didn’t Vader simply arrange for Stormtroopers to come to Han/Leia’s hotel room and just arrest them there? Why the elaborate ruse? Presumably, the Empire already had control of the entire city even before Han and Leia arrived, so the subterfuge just seems unnecessary.
This doesn’t have any effect on the plot though. If it happened like you described nothing changes.
But an attempt at a logical answer, the dinner scene is more confined. Vader on one end, the troops on a more open end. If they tried to enter through the room, only one person can enter at a time, so the troopers will be bottlenecked. I guess you can argue Vader could capture them himself. However, there’s potential escape routes. Maybe there’s a way to get under the floor, another room that leads to another. Our hotel rooms have fire escapes and such. Hell, Han and Leia would probably be willing to risk jumping out the window over being captured by Vader. Worst case they’re dead, worst case with Vader, they’re tortured and forced to extract information about the alliance and then killed (“They didn’t even ask any questions”).