If Bob's Big Boy were to rise from the dead, undergo a mod-meets-futuristic makeover at the hands of Judy Jetson and Endora, the fiery mid-century queen of a mother-in-law from "Bewitched," and move into the Hard Rock Hotel, it would look something along the lines of Maryjane's. A piece of pop art in itself, the diner's stylish retro-camp vibe assures eating chicken pot pie in public needn't...