Couple of options here based on @DoubleDAZ's suggestion above ...
I like the idea of wrapping it around the room (and "hiding" the sidings (which I planned to build using O27 gauge track, instead of FT) from the main track) but it's going to be a bear to get to that upper right corner as that table is almost 7 feet deep. If I move it from the wall, so I can get back there, I cut off the space between the main table and the siding table ... and it's already a squeeze at 3 feet distance between the two. I'd like enough space between each siding because one will be for "passenger service" and the other will be industry with chemical industry (lots of tanks).