“Beyond Tango,” pianist Pablo Zielger’s 17-song performance, fused the sharp sexiness of tango music with the jaunty improvisation of jazz to create an enlivened and engaging musical experience at the Mondavi Center on Friday. Zielger began performing classical music at age 14 in his hometown of Buenos Aires, Argentina. In the 1960s, Zielger’s career made the leap to jazz music. Inspired by both classical and jazz compositions, as well as classic tango rhythms, Zielger formed his Quartet for New Tango in 1990. The Mondavi Center’s 1801-seat Jackson Hall was nearly full for the performance, accommodating all ages of music lovers, from the young family to my left to the college-aged women