Bill in Dayton... you kind of insinuated you are interested in catering to... playing lots of animal clubs, the boys (and girls) coming back from Iraq and joining a VFW or American Legion for the first time.
That being the case, nothing wrong with finding a few killer 60s or 70s covers but I would try hard to find those from the 80s and newer. The 60s and 70s have been absolutely played to death.
There was a popular band here that I _loved_ their music. Because they played 80s and newer. NOBODY played those songs.
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Bill