Well, there's plenty of food for thought here. Generally we don't have this kind of worry - a group of modern dancers, or the cast from the touring company of "Footloose" or "Mahalia" just don't go out on the town gigging !
And yes, there is some question if the "so-so" critic was all that informed. I agree we shouldn't be booking "so-so" acts, and in this area of presenting (jazz), one person's meat is really another's poison. In general, jazz has not been a big seller on our stage for years - which is why we strive to accomodate groups touring through; we're promoting artistic diversity and that sort of thing.
We will know next time -- if it's a small jazz, folk, or bluegrass act -- to watch out for this particular little wrinkle!