Ralph Alessi, internationally acclaimed trumpeter, will hold a workshop on improvisation and perform a concert with his ensemble This Against That. Members of the ensemble include Tony Malaby, saxophone, Drew Gress, bass, Andy Milne, piano and Mark Feber, drums. Workshop will be held beginning at 4pm and the concert will begin at 8:15pm, both in Towson University's Center for the Arts Recital Hall. Tickets: $16 general admission; $9 seniors; $5 students