Traders and councillors say curry houses are now struggling to compete with the shisha bars and fear it could be the end for the Curry Mile.
They say some of the shisha bars are allowing customers to flout the smoking ban and illegally smoke shisha indoors.
Under the law, the shisha bars are meant to restrict customers to smoking outside, often on a terrace.
Manchester council is now launching a campaign to crack down on people who flout the smoking ban at shisha bars, and to highlight the health risks of smoking shisha.
And doubtless the main element of the campaign will be this particular lie:
...according to the WHO, an hour of smoking shisha for one hour is equivalent to smoking 200 times the volume of smoke in one cigarette.
...studies led by independent researchers at the Royal University of Saudi Arabia have shown that shisha smoke is 30 times less concentrated in chemicals than cigarette smoke, contradicting the WHO's warnings. "It is ludicrous and anti-scientific to claim that hookah or shisha smoke is 200 times more toxic than cigarette smoke," he says. "While about 5,000 chemicals have been identified so far in cigarette smoke, chemists and pharmacologists from Saudi Arabia only found 142 chemicals in shisha smoke. Also, a medical team in Pakistan found that shisha smoke can be much less carcinogenic and radioactive than cigarette smoke."
"The research on shisha is admittedly limited," concedes Anis. "But I have to concur with the WHO. If you watch the way people smoke shisha, they take deliberate, deep breaths before exhaling so there is a lot of smoke being inhaled."