Open mics - or open jams - are not "free" to the club/bar - they are paying the host(s), and the going $$ rate is usually the same as for a solo or small band act.
My reverbnation site: http://www.reverbnation.com/mikebirchmusic
Youtube: http://www.youtube.com/mikebirchmusic
Facebook: http://www.facebook.com/mikebirchmusic
Youtube: http://www.youtube.com/mikebirchmusic
Facebook: http://www.facebook.com/mikebirchmusic
