Fact
A typical 60 minute hookah session is the same as smoking 100 cigarettes.
Source 1:
"Waterpipe Tobacco Smoking: Health Effects, Research Needs and Recommended Actions by Regulators. WHO Study Group on Tobacco Product Regulation (TobReg)." World Health Organization. Geneva, Switzerland. 16 Sept. 2005.
http://www.who.int/tobacco/global_interaction/tobreg/Waterpipe%20recommendation_Final.pdf