British singer Rita Ora enjoyed a wild night with a crew of model types at the Gramercy Park Hotel’s Rose Bar yesterday. “They were dancing and drinking until 4 a.m.,” says a spy. “When they left, a waitress chased them out of the bar and knocked on the car window to make sure they paid their bill.” Another source insists Ora’s crew was not trying to dance and dash, but left a credit card at the bar after paying their tab and the waitress returned it. Ora’s rep added, “She would never leave without paying.”