Write-up by Jacqueline Bennett newsandviewsjb.com   “Let me call you sweetheart, I’m in love with you ….” Who wouldn’t want to receive a romantic serenade of such timeless lyrics for Valentine’s Day?   For those in the Greater Hartford, Connecticut area, the Silk City Chorus continues its longstanding tradition this coming Friday and Saturday, February 13 and February 14, of offering a “Singing  Valentine” personally delivered by a “tuxedo-clad Barbershop Quartet” – sung in “magnificent 4-part harmony”. For $50., in addition to performing two love songs, they deliver a card, a fresh rose and a photo of the quartet singing to the recipient.   Singing valentines have become a hallmark of the award-winning, Manchester-based chorus that is a member of the 75-year-old non-profit Barbershop Harmony Society.   “We perform valentines at offices,…