Social Business Cities:
A Social Business City is a municipal ecosystem aiming at fostering social businesses locally. A network of local institutions and enterprises shall support social business entrepreneurs. Social Business Cities like Pistoia, Barcelona and Taoyuan have gone through a social business city programm (3 years), which implements and evaluates such a city network. It can be coordinated by the Yunus Social Business Centre Florence: https://sbflorence.org/en/pistoia-social-business-city
Social Enterprise City Plymouth:
In the UK the government organisation Social Enterprise UK certifies "Social Enterprise Places" like Plymouth calling them Social Enterprise Cities: https://plymsocent.org.uk
Social Economy Berlin:
Berlin has built up a social business ecosystem coordinated by send e.v., an umbrella association for social entrepreneurship in Germany. It offers consultancy, networking events and other support in terms of finding funding opportunities: https://socialeconomy.berlin
Social Entrepreneurship City Hamburg:
German city Hamburg has launched its network in February 2014 offering consultancy, funding, networking and knowledge sharing: https://socialentrepreneurship.hamburg