Lyric discussion by musoshi 

Cover art for This Town lyrics by Elvis Costello

To me:

This song is about a few different people (Charlie Sedarka, Mr. Get-Good, The Girl with...) in a town or community. Obviously they are imperfect people, perhaps unsavory. Either way its about people and the strange emotions they have about certain things.

And in this community, unless you're a nutter, you won't make it.