Ten acts that could almost pass as jam bands

There are countless bands that stray from the traditional song formula and jam the hell out live. Many of these acts fall under the amorphous indie tag, but there are a few that have notable prog- and psychedelic rock undercurrents flowing through their music, which is naturally conducive to improvisation and exploration. As such, these bands often take chances, and some really have a knack for playing on the cuff live. While they're obviously not, here are ten acts that could almost pass as jam bands.

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Leslie Simon