Ultimate Tango School of Dance in Medford presents its 30th Virtual Tuesday program of the pandemic. Virtual Short Sequences is offered at 7:30 p.m., adding (from side step): arrastre to the left (twice) and barrida to the front cross from small volcadita. Virtual Solo Exercises follows at 8:30 p.m. Classy Heels is available as a prerecorded YouTube video for a solo workout at home. There is no fee required for participating in live classes or for watching the prerecorded videos…