ADAPTIVE REUSE. With diesel-powered commuter trains providing the only service into Metra's North Western Station, much of the former Chicago and North Western crew room and baggage facilities under the trainshed north of the Washington Street commuter concourse has been idle. Metra will be realizing some rental income from those properties after they're converted into MetraMarket. But isn't calling it Chicago's first French-style fresh food market a bit Arch Deluxe? The Reading Terminal Market, which has been under the trainshed at Philadelphia's Reading Terminal for years, has long offered vegetables, cheese, meat, fish, baked goods and flowers (as well as restaurants and taverns, not to mention scrapple, apple pan dowdy, and shoo-fly pie.)