According to a source, the 17-year-old approached the bar of Camden's Roundhouse for a drink while watching Chance The Rapper with his friends last week, reports aceshowbiz.com.
However, the bar staff at the venue recognised him and knew he was underage.
"I know you, you're Brooklyn Beckham," the server told Brooklyn before he left.
A source told The Sun newspaper that Brooklyn was forced to stick to soft drinks for the rest of the night.
"He looked pretty sheepish," said the source.