The couple will often have dates nights at various hotels in LA where they pretend to be strangers who meet at the bar, reported Daily Star.
"They'll get a sitter for their daughter, Olive, and take turns arranging a monthly overnight stay. They'll meet at the bar and pretend to be business travellers. Once Drew dressed up as a chambermaid and Will was a hotel guest," a source said.
Barrymore has previously spoken about her and Kopelman's nights without their daughter, saying it is important for their relationship that they have time alone.