My band recently did a showcase in Nashville for prospective producers for our next record. No, I didn't know you showcased for producers either.
Anyway, it went well. A particularly encouraging sign was when one A-list producer who'd attended helped us load our gear into the trailer after the show. (Not something we're used to seeing.) We told him that if this whole record producer thing didn't work out, we could always use him as a roadie. We told him we don't pay much, but we can promise him an uncomfortable ride across the country.
Turns out, he's going to stick with the producing.