The pair were seen at Koi in Los Angeles, but it seems the "date" wasn't of the romantic variety.
A source told the Daily Mail that it was strictly business, explaining, "They were both at a dinner organized by a member of their management team. There was a group of artists and staff from Turn First at the get together. There is nothing going on between Rita and Zayn."
Also, given the fact that Rita was just quoted saying she'd never date Zayn (even though "he's gorgeous") because they share a management team, it sounds unlikely she'd turn around and be seen on a date.
Still, this is how rumors get started, you guys...