Prostitution is Switzerland with sex workers required to register with local authorities and pay taxes.
But while Bern is currently home to 28 licensed brothels, this number is sinking and there is growing opposition to plans for new establishments.
At the same time, there is a rise in the number of sex workers temporarily renting out apartments using sites like Airbnb, as Bern daily newspaper Der Bund reports.
There were 12 reported cases in the canton of Bern from April 2017 to April 2018, although the real number is thought to be much higher.
A police spokesperson described the figure as “insignificant” and noted that most of the women involved lacked the necessary work and residence permits required to work in a legal establishment.
But Bern cantonal parliamentarian Christa Ammann, who heads up a specialist unit conducting research into the sex industry, says rules introduced in 2013 requiring brothels to register have made sex work more expensive.
The latest annual report into sex work in the city notes prostitutes are required from 100 to 150 Swiss francs a day to rent a room in a legal brothel. However, there are dozens of apartments listed on Airbnb for less than this amount.
The trend towards the use of private apartments for sex work runs counter to the intention of rule changes in Bern in 2013 which are designed to protect prostitutes from abuse and exploitation.
But despite this tendency, police are positive about the new rules, arguing “the situation has completely calmed down” and that authorities now have much tighter control.
Ammann, meanwhile, is calling for prostitution to be completely decriminalized.
Prostitution is legal in Switzerland although individual cantons have different rules on where and when it can be practised. Forcing someone into prostitution is, however, illegal.
Recently, a women's rights group in Zurich called for a Swedish-style ban on sex work in Switzerland, using the video above in its campaign. In the Scandinavian country, it is illegal to pay for sex with clients.
But groups in Switzerland including the Swiss Aids Federation have said such a ban on prostitution would drive sex work underground and make the fight against exploitation of women even more difficult.