This is a Gypsy tune, played by Balkan Spirit, a band I no longer play with. I played bass and harmony voice on this recording, as well as engineering and production (live to 2 track).
The instruments you hear are: Cimbalom, Guitar, and Fender Bass, plus two voices. This was recorded live to stereo.
I believe that 'Opa Zupa' is an invitation to dance... :)