A couple extra options if your culture is high enough(doesn't take much culture):
3. [insert cultural name here] cultural advisor says: "Dude, if you want to have art, we should pay people like me to add murals to some of the walls of the city. While it would cost tax dollars, just think of the cultural and environmental benefits from doing such."
4. [insert business name here] business consultant says: "I have a business venture to propose about this. Instead of art, there could be an agency for placing bulletins and signs that advertise varying products. Just imagine the increased business from doing such!"
{risk with 4} - Crime would increase due to haters, stripping down bulletins.