A West Australian barmaid in Perth had been slapped a $1,000 fine by a court on Wednesday for showing patrons she could crush beer cans between her exposed breasts.

The Mandurah Magistrates Court fined Luana De Faveri, 31, after she pleaded guilty to violations of the Liquor Control Act.

Her co-worker, Tracey Amanda Leslie, 43, was also fined by the same court of $500 after pleading guilty to assisting the De Faveri breach the law by helping her hang spoons from her nipples.

According to a police statement, De Faveri had twice exposed her breasts to patrons in a hotel in Pinjarra, about 87 kilometers south of Perth.

The police said, "She was alleged to have also crushed beer cans between her breasts during one of the offenses."

Roy Williams, the pub manager, was also fined $1,000 after pleading guilty to failing to stop the women perform the act.

David Parkinson, local police superintendent, said, "It sends a clear message to all licensees in Peel that we will not tolerate this type of behavior in our licensed premises."