The romantic city is a city of tales of lovers, bohemian artists, and cafes around every corner waiting to shelter in their tables the writers and clerks equally, all brought together by the cosmopolitan ambiance. Putting it simply, mix creativity with prosperity and you get the city of pink cobbled streets.
One way to start is to go directly to the townhouses—they need requirements, are costly, and house a medium quantity of people, but are private homes and give creativity so you can put them near to offices without harm. Use sad gardens for the productivity of the offices or go for banks and realtors. Use the creativity plus the prosperity for the venues, as the townhouses are private homes where they will create children. The ice cream parlors will keep them busy and art galleries gives nice enhancements, and the art expo is even better at spawning street artists.