A church in downtown Missoula
A derelict grain elevator converted to studio space
The former Atlantic Hotel
A converted railway station, Milwaukie Road, I think — it's now a private club
The Wilma Building, downtown Missoula
Also, most of these photos are geotagged. I've been experimenting with that feature in Flickr. We'll see if it makes any difference at all, but if you happen to be in Missoula, you should be able to figure out exactly where the sites pictured are located.
As usual, see the Flickr set here for more photos