In observance of the Martin Luther King Holiday, Gannon University will host a prayer service at 9 a.m. in the University's Mary, Seat of Wisdom Chapel, 520 Peach St. The public is welcome to participate. Also on Martin Luther King Day, Gannon will host a light lunch from 11 a.m. to 1 p.m. in the Yehl Ballroom of the Waldron Campus Center, 124 West Seventh St. The lunch is free and open to the public.