At New Orleans by the Bay, the Rev. Al Green won't be the only participant worthy of the pulpit. On Friday night, Green will be joined by a double shot of gospel legend: the Mighty Clouds of Joy and recent NEA Lifetime Achievement award winners the Five Blind Boys From Alabama. These two acts should handily generate the infectious energy of the Gospel Tent that longtime Jazz Fest visitors have come to crave. Lest the calls for salvation get heavy-handed, the Dirty Dozen Brass Band will be prepared to blow some second-line syncopation.