It's not the only bizarre rule that tourists to Spain should be aware of.
The medieval town of Salobreña forbids the use of barbecues on beaches and those caught breaking the rules will be landed with a €3000 ($NZD5000) fine.
Anywhere in Spain, if you are caught walking to or from the beach on the street in swimwear you can also be fined $480.
As for nudity, you face a $1200 fine if you're naked and it is not a designated nudist beach.
Palma Council is reminding holidaymakers that breaching new rules aimed at cracking down on drunken behaviour could cost them fines of between $165 and $5000.
Traders are specifically urging police to dish out fines for any tourist taking part in the "shell game," which is outlawed in the resort of Playa de Palma.