The duo were caught hitting clubs together two nights in a row, until morning, reported Aceshowbiz.
The 28-year-old Barbadian songtress, who has been traveling across Europe as part of her "Anti World Tour", was seen in an all-black knee-length dress with golden jewelry and wearing light make-up.
Meanwhile, the rapper was in his all-time casuals, with a beige hoodie and matching pants and a black jacket over it.
Earlier that night Drake joined Rihanna onstage during her concert in Manchester and made a surprise appearance to deliver his verse on their No 1 hit "Work".
Drake also praised her after finishing their duet by calling the singer most beautiful and talented woman.
"Manchester, you got to make some noise for the most beautiful and talented woman I've ever seen in my life....I'm getting my heart broken," he said.