I never intended to get involved with O-gauge because I didn't have space for it, but ... after having some "temporary" track on the floor, I realized I could run track around the perimeter of the room with most of it out of the way of normal foot traffic. I sit in a center stairwell for convenient viewing - it's like a 23'x 23' table with a small center operating pit.
At first I ran double-track along two walls with O31 turn-back loops, essentially a bent dog-bone arrangement. Later I arranged double-track all the way around the room with O54-O72 curves by tunnelling under furniture in some places.
