Artsy-fartsy P Street coffee house preserves mid-nineties rebel yell for crunchier-than-thou Vermont transplants, suburban closet-cases, underaged tween activists from privileged Virginia McMansions and tired, aging hippies with Federal pensions. Free-spirited sandwiches heavy with alfafa sprouts, avocado, other California-style wraps and organics. Menu spelled out in happy chalk letters. Girl...