(By Michael Persinger, mpersinger@charlotteobserver.com) How great would it be to reach a point in life where you only had to do things that were fun?Fleetwood Mac, which has been around as a band since the 1960s and as a pop phenomenon since 1975, is there. The band shared the result with a crowd that reached the rafters of Time Warner Cable Arena on Saturday night.There's no album to promote -- "yet," singer and lead guitarist Lindsey Buckingham told the crowd.