Here in the states they run the full circle of extremely organized to anarchy.
Some are suit and tie meetings where the speaker is expected to dress for the podium. We also have classroom style meetings ( not a fan of these) where it is very much like being in school.
We have some meetings where if they run a minute over the scheduled hour members will start grumbling.
We have meetings here in PA where people need a break halfway through ( this was a tradition even before no smoking laws were enacted)
Some meetings have a Q&A session. This can be alot of fun if you have the right crew. Years ago we actually had a meeting that emulated a TV show from the 70's ( The Gong Show) That was loads of fun but not what many would call a healthy meeting