There you go: http://www.theguardian.com/science/2008/jul/19/medicalresearch.fooddrinks http://www.theguardian.com/science/2008/jul/19/medicalresear... It main

There you go: http://www.theguardian.com/science/2008/jul/19/medicalresearch.fooddrinks http://www.theguardian.com/science/2008/jul/19/medicalresear... It mainly happens in busy city bars/pubs, where repeat customers aren't so important.