The SEVA Foundation has changed the venue for Wavy Gravys 71st birthday party. The multi-band event will now be held at San Franciscos Grand Ballroom. As previously reported, the multi-band bill will take place May 18, featuring Mickey Hart and Friends, Chris Robinson and his ‘Wooden Family,’ Zero featuring Steve Kimock and Melvin Seals, Tea Leaf Green, Sikiru Adepoju and a number of surprise guests. The party will now primarily be a general admission event, though a limited number of seats will be made available. SEVA will honor all previously purchased tickets.