A major influence on many musicians over the last half-century, including Van Morrison, Bonnie Raitt and Elvis Costello, Mose Allison's pioneering blend of jazz and blues is thoroughly American. He's touring in support of a new album, The Way of the World. Through Sunday, Sept. 4, at 8 p.m. and 10 p.m. Blues Alley, 1073 Wisconsin Ave. NW. Tickets are $25, plus $10 minimum purchase. Call 202-337-4141 or visit bluesalley.com.