Which state is more socially liberal?

[RI]

Colorado has the most liberal bastions of these states, but it has a lot of really conservative areas too. Pennsylvania doesn't have any really socially liberal areas--I suppose the Philly suburbs are the closest--but it also doesn't have as many hardcore socially conservative areas as Colorado. Michigan and Arizona have no socially liberal areas other than Ann Arbor and maybe Lansing.

I'll give it to Colorado, narrowly.

[RI]

and yet AZ is the only one that voted against a gay marriage ban.

I seem to recall that there were some extenuating circumstances in the 2006 proposition in that it banned existing domestic partnerships and other things I can't remember. Furthermore, Arizona overwhelmingly voted to ban gay marriage in 2008. It doesn't have one single area that can be definitely called socially liberal save maybe parts of Tucson.