Boston needs to grow young, in the same way many of us need to grow up. Somber, red bricked, brown stoned, the keystone of New England dignity — it's almost as though the Puritans are still in residence. Enter XV Beacon pronounced Fifteen Beacon, for those who forgot their Roman numerals, the new sign of the youthful and moneyed times. In the heart of the blue-blooded Beacon Hill neighborhood, XV Beacon is a forward-thinking hotel—and the first major “boutique” hotel in Boston—for those entrepreneurs to whom fashion, cutting edge design and technology are actual concerns.