"According to legend, a trapdoor somewhere under the carpet drops to train tracks below." Yeah, right. The Great Northern tunnel is well to the west of here, and it is extremely unlikely that it opens to any buildings above; it would be structurally unsound, and we know the tunnel has no ventilation anywhere along the route.

I'm guessing this legend was borrowed wholesale from another city which has legends about trap doors in bars, like Portland (where they supposedly dropped you into a basement from where you were press-ganged you into service on ships) or New York (where Bowery bars supposedly robbed you in those basements). I think the latter might be true, but despite every Portlandian believing the former to be true I've never seen any real proof. Seattle? Train tracks? Nuh-uh.