Ultimate Tango School of Dance in Medford presents its 36th Virtual Tuesday program of the pandemic. Virtual Short Sequences is offered at 7:30 p.m., featuring the start of a new series focusing on Boleos. A couple of days before the class, view Ultimate Tango's on-demand video to  study the sequence, hear the explanations, and try out the exercises before the live Zoom class. Virtual Solo Exercises follows at 8:30 p.m. The cost for Virtual Short Sequences is $20 per month; register…