Jukeboxes
According to what we've heard, there are two types of jukeboxes in bars. One type is owned by a company that puts it in the bar. The other, more desirable type are the ones that are owned by the bars themselves.
Getting your CD in one of these jukeboxes is easiest if you have any barfly friends who have a great relationship with a particular bar. In our case, we had a few, one of which actually put our album in the jukebox. They'd play it from time to time when they came to the bar.
The best part of this is that even if our album doesn't get played, people see our album and band name on a regular basis as they page through the albums. This really helps your name recognition and continues to reinforce that your band is popular in a local area.