Ultimate Tango School of Dance in Medford is offering a four-week Tango Mixology Course for advanced dancers on Sunday mornings in December. Presented via Zoom, the course challenges you to mix all available tango elements adding sacadas, boleos, ganchos, barridas, volcadas and colgadas into danceable combination. Cost is $120 for the course (Dec. 6, 13, 20 and 27). Register through the Ultimate Tango website: https://courses.ultimatetango.com/pages/virtual-advanced-courses