So, when I testified in a case in TX, we discussed strategy at lunch in a crowded restaurant. It was kinda like that "Regarding Henry" film. The lawyer said he wanted to grind the opposition down by forcing them to fly in a guy from MI and burn up 8 hours of testimony. The guy had a brain tumor and was not allowed to fly at high elevation. Some kind of life-threatening thing.
When I testified in NV, we had a break and 2 opposition attorneys followed me and want to argue with me when I was standing at the urinal. One on the left and one on the right, behind me. I wish I would have thought quickly, like Jack Nicholson did in the film, "Wolf." The lawyer hiring me came in and chased them away and I was allowed to relieve myself, in peace.
When I testified in a case in CA, in downtown LA law offices, the law firm hiring me told me they wanted the opposition attorney facing the window, as he was about to take a vacation trip to Hawaii and they thought it might provide a psychological advantage. I will never forget that one. It was around 1987, in some expensive downtown hotel with law offices in an atrium, and it cost $20 for breakfast, with 1 egg and 1 strip of bacon and toast.
Anyway, folks can overhear quite a bit, simply by being in the area and not directly asking anyone anything.
Stay well.
AJ