600/60 = 10 sq. ft. per person or 3.1 ft. square per person. Assuming no furniture or band equipment. With keyboards, wires for microphones, amps, music stands in the room?? I agree with Gary. A 600 ft living room is fairly big IMO, but still won't fit 60 people with equipment.
Starkeeper

[This message has been edited by Starkeeper (edited 09-20-2004).]