The owner and manager of a shisha cafe in Leagrave Road were both fined for allowing people to smoke in an enclosed marquee.
Mohammad Sohel and Anam Miah refused to comply with the law regarding Anando Mahal Limited and were fined £355 in total.
Miah was fined £75 with an additional £15 surcharge, and the business was fined £250, plus a £15 surcharge.
Councillor Aslam Khan, the Council’s tobacco free champion, said: “While smoking shisha is legal, it is still subject to the same smoke free legislation as cigarettes and other forms of tobacco smoking.
“The law is clear – you cannot allow people to smoke inside public premises. If we catch you, we will take action.”
The minimum legal requirement is to have at least half of the premises open to the air.
Luton Stop Smoking Service offers support and advice for anyone wanting to quit smoking. For more information, call for free on 0800 013 0845 or go to www.tobaccofreeluton.co.uk
The owner and manager were fined at Luton Magistrates Court on April 22 April.