The classic beach getaway has been given a facelift. East Coast vacationers, head to Tides Beach Club in Kennebunkport, Maine, a sunny mansion with wraparound porches that offers glamour, comfort, and a tribute to the '60s. Or fly your freak flag on the left coast at Hotel Erwin in Venice Beach, California, where a room reservation gets you street-food tastings, a tattoo appointment, and DJ lessons....