Blimey, Peter, don't you have legs? It's two or three minutes walk from the roundabout to the bar! The answer is that the depot is behind the bar and the tramway runs virtually underground there - there really isn't a lot of space, when you think about it - unless it stopped on the circuit, of course.
When the plans were first around I remember asking the guy in the Tramway "shop" if the bar was staying - he thought it was very funny that this seemed to be my main concern, but was sympathetic.