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. Decide for yourself tonight when the Texas band brings its plucky banjos and heartfelt lyrics to Denver. 8 p.m. The Soiled Dove Underground, 7401 E. First Ave. 303-366-0007, $12-$15