It's been ages since I last tried a dancing pose, and the reason is mostly that they are not easy. References or not, bending your mind around drawing two figures in sync with each other is difficult. Regardless, I was bored of single-character drawings and also inspired by "Tango de Roxanne" from Moulin Rouge.
But just to throw a wrench in the works, the taller/lead dancer is female. The shorter one is the guy.