The band brings its mix of blues, R&B, Motown, soul, rock, jazz and funk to Roscoe’s, 117 S. Main St. , Phoenix, at 8 p. m. Friday and Saturday, Oct. 12-13. The Reactions are David Blees on keys, Robert Clark on guitar and Andrew Linville on drums. Leading the band is bassist Thom Cammarota. The cover is $3.