Bluegrass? Experimental acoustic? Although the band's Billboard-ranked album Blind Man Walking has won kudos from fans for putting a modern twist on classic bluegrass, critics are unsure what to call the sounds of this youthful quintet named Cadillac Sky [2]. Decide for yourself tonight when the Texas band brings its plucky banjos and heartfelt lyrics to Denver. 8 p.m. The Soiled Dove Underground [3], 7401 E. First Ave. 303-366-0007, $12-$15 [3]