Singaporeans are flocking to concrete pits to participate in the nation’s most expensive form of aquatic psychological warfare.

For $20 an hour, these elite sportsmen sit on plastic stools, sweating profusely while holding sticks over murky water filled with prawns that have higher IQs than the customers.

The hobby, which combines the thrill of gambling with the activity level of a coma patient, allows locals to "lepak" while being drained of cash and blood by mosquitoes.

"Wah lau, I sit here three hours already, catch two small ones only, sibeh rugi sia, but worth it leh because at least my wife cannot find me here to nag," said 45-year-old Tan Ah Kow.

Experts suggest that simply buying frozen seafood at the supermarket would be more efficient, but that lacks the necessary element of public humiliation.

Ultimately, paying a premium to torture a crustacean remains the pinnacle of Singaporean leisure.