"Libraries aren’t known as hot spots to meet singles. But the dimly lit conference room in the Shirlington Branch Library in Arlington County sounded more like a house party than a place for inside voices. On a recent September evening, men and women young and old exchanged phone numbers, e-mail addresses and book recommendations. They aren’t in a book club. They’re speed dating. On the third Sunday of every month, bookworms arrive in the hopes of meeting someone special through a common love of reading."