A shisha bar in north-west London has been fined by Harrow Magistrates' Court for allowing teenagers to smoke.
The Sahara Lounge in Stanmore Hill has been fined £600 and employee, Nasser Manssor, from Kilburn, was fined £200.
Both Manssor, 29, and the company pleaded guilty to selling tobacco to a person under 18 years of age.
Trading Standards officers from Harrow Council sent teenagers, aged 13 and 14, to try and purchase tobacco for shisha from the bar in March.
Officers targeted the shop after spotting two groups of boys in school uniform smoking, the council said.
Councillor Susan Hall said: "For generations schoolboys have smoked cigarettes behind the bike sheds, but seeing schoolboys on cushions with a hookah pipe was rather a new twist on this theme.
"The case demonstrates that business owners must make sure that all their staff are trained correctly with regards to age-restricted goods, otherwise they will be paying the penalty."
The Sahara Lounge was also ordered to pay £720 towards prosecution costs and Manssor was ordered to pay £150 for the same.