Janis Siegel of the Manhattan Transfer is one of the most versatile singers in jazz and song. She can sing (always delightfully) vocalese, standards, gospel, doo-wop, a kaleidoscope of “pop” songs, bossa novas, and then some. Requinte Trio is a new group she’s been working with recently, featuring pianist John DiMartino and guitarist and vocalist Nanny Asiss. ("Requinte" is Portuguese for refinement or elegance.) Their newest album is Honey & Air, and they’ll sing those songs and much more this Friday evening, April 21st in the new “Jazz on Bleecker Street” series at the Sheen Center in Manhattan. They’ll be joined by trumpeter Randy Brecker.