Rubi’s Cafe Rubi’s hits the brunch trifecta with its excellent lattes, tastiest grilled cheese offerings (I mean, they are cheesemongers) and coziest seating due to their always-on fireplace.  264 Main Street, Great Barrington Scout-House One of the town’s newest boutiques, Scout-House offers an impressive cashmere selection and enough chic home and kitchen offerings to unearth your latent Martha Stewart, but it’s their dark-but-sufficiently-lit book room that might prompt you to cancel any and all afternoon plans. 21 Elm Street, Great Barrington Hart In her new locale, owner Jamie Goldenberg can show off her divinely bespoke pillows and Japanese paper and cotton lampshades,…