the greatest bj show i've attended was in the worst place: "wels" a 50,000 or less "city" during the td tour. but the audience was roaring from the first to the last song and the band had quite a lots of fun- jon was ****ing astonished about the - for european measures- small crowd of "only" 36,000 and every 2nd sentence was "such a small stain o' people and so ****ing loud"
i think it depends on the mood of the band and on the reaction of the crowd...