"Dear intercourse participants..."

At first I thought this was a rather amusing translation botch by German architecture publication, AIT magazine. But on closer inspection, I realised that they actually mean exactly what they say.

Zurich, in a goal to make its city more beautiful, applies the strategy of basically setting up a camping ground or rather, as they describe it, a system 'similar to a drive-in restaurant', to move paid-for intercourse to strict zones in the city.