When aliens explore America, after we've rendered the planet uninhabitable, surely they will remark, "Damn, what's up with all these drugstores?" As the CVS-Rite Aid arms race drops a haze of fluorescent lighting on every other street corner, Discount Drug Mart should be celebrated for its unobtrusiveness alone. Most stores inhabit strip malls, not space-wasting, freestanding locations. Inside, the shelves are crammed with goodies -- beanbag ashtrays, winter mittens, dice -- at warehouse prices. Refill your Zoloft; pick up a caulk gun.