Reply #5: Sorry, but the definition of infrastructure is fairly easy to understand here

[IDemo]

The basic facilities, services, and installations needed for the functioning of a community or society, such as transportation and communications systems, water and power lines, and public institutions including schools, post offices, and prisons. http://dictionary.reference.com/browse/infrastructure

If your city or state feels strongly enough that it needs to construct or improve entertainment venues such as zoos, ballparks, or museums, it is perfectly free to raise taxes or sell bonds to do so. There is simply no justification for pretending that these things in any way fall under the definition of infrastructure.