The Punchbowl in London, owned by Madonna and her husband, Guy Ritchie, has been selling beer at different prices, reports The Mirror.
The bar, built in 1750 and located in the Mayfair section of the city, is under investigation after claims were made that regular customers and tourists were being charged differently.
If the allegations are found to be true, the Punchbowl could lose their license for exploiting tourists. Madonna and Guy Ritchie bought the Punchbowl last February for more than $5 million.