Not a big city, but in Colombo, there is an ISP that exclusively provides Fibre lines to apartment buildings. It's a common interest for both building management and the ISP to provide service.

If the building signs up with the ISP, any customer from that building can sign up directly at ISP, and they can setup the connection within the same day.

Price wise, they are on par with other ISPs, but the Sri Lankan government heavily regulates the prices.