Cruise ships with all-night bars, resorts that cater for stag and hen nights and a swimming pool area where tourists can sleep off the hangovers the next day will be winners in this type of tourism, according to the trend forecasters.

CNN: Trends: Tourism with intent

It shows Mr Lerwell and Mr Lilley - members of the Swansea Predators cage fighting team from Mount Pleasant - dressed in women's clothing celebrating a stag night in Swansea city centre on 30 August this year.

BBC: Cage fighters' stag night web hit

As a result, the city attracts thousands of "stag night" tourists each year, who are often responsible for noise pollution, garbage and vomit-covered streets.

BBC: Spoking the fire in Amsterdam