LA Fitness has launched www.choosetakeaway.co.uk which allows visitors to the site to calculate the number of calories they burn in a year during sexual activity. They are then awarded a hotdog or kebab rating, according to their fast food preference.
People who forward the site to their friends are presented with a printable voucher entitling them to three free days at the LA Fitness club of their choice.
The site is being promoted on plastic water cooler cups being distributed at offices in London, Birmingham, Leeds, Manchester, Belfast and Glasgow.
Andy Kidd, LA Fitness marketing manager said: 'We hope this challenge will quickly be taken up by the public and spread across the internet. We want people comparing their hotdog ratings!'
