Artist: Rolling StonesAlbum: Rolling Stones Live At The El Mocambo 1977Reviewer: Rod Strachan The Rolling Stones had in 1977 long been touted as the world’s greatest rock and roll band. After a 7-month hiatus off the road the band played two shows in the tiny 300-capacity venue on the 4th and 5th of March ’77 and the audio is being issued across a 2CD set and as a 4LP vinyl package. Both formats feature the whole performance from the second date, with three bonus tracks from the 4 March gig, all newly mixed by Bob Clearmountain.  The band’s secretive gigs were covered up better than a White House scandal with lucky radio winners expecting to see local Canadian act April Wine &