KPLU’s free tickets contest this month features Mark Hummel‘s 25th Annual Blues Harmonica Blowout. Joining Hummel are Curtis Salgado and Charlie Musslewhite, among others. There will be some of the best blues harp around. The show runs from Thursday, Feb. 4th to Sunday, Feb. 7th, with two shows on the 5th and 6th. The drawing is for Thursday evening.