Hayden Panettiere showed off her moves at Susanne Bartsch’s “Catwalk” party at Marquee on Thursday. “She got on top of the dancer’s box and started to dance jokingly for her friends,” says a spy. Another witness tells us it wasn’t all fun for the “Nashville” star. “Later, it looked like Hayden was taking care of her girlfriend, who seemed really wasted and was trying to bum cigarettes,” says our source. Earlier, Panettiere was spotted at the One Group’s STK Downtown.