Ethan Eubanks' Blues Bangers are a mainstay at Bar LunÀtico.   Led by hard grooving drummer Ethan Eubanks, they feature the cream of the NYC blues guitar crop.   The inimitable Irving Louis Lattin will front the band tonite with Fred Cash manning the bass.   Those are two of the grooviest right there  - plus there are murmurs of a special guest.   Not to be missed.