The Invincible Grins are a 4-piece band playing âfunked-upâ folk music, according to their Facebook page. We know them as a Jerome favorite band, having played around this area for years. Do you want to have a good time and dance to great tunes? Then drop on by the word-famous Spirit Room stage and see this extraordinary band for yourself. Your ears wonât believe what your eyes are seeing! Or is it your eyes wonât believe what your ears are hearing?