You name it - London Banks, Chambers of Commerce, Councils, Dentists, Doctors, Emergency Nos, Fire Station, Halls for Hire, Hospitals, MP, Churches, Police Station, Recycling, Restaurants, Schools, Shops, Social Services, Travel Utilities.
Local Chambers of Commerce for EC3N 4AA with contact details and location maps. These can be an extraordinarily effective way of getting into the business community and / or getting things done. Equally they can be entirely useless depending on the chair. If they have networking events associated with them definitely go, and keep going, if you have a business that need local support. What you put in is exactly what you get out.