Live music and theater will be featured in the Arlington Alive Summer Arts Block Party Saturday in Arlington Center. The free party will run from noon to 5 p.m. on Broadway Plaza and then continue at the Regent Theatre from 6:30 p.m. to 9:30 p.m. The party is sponsored by the Arlington Committee on Tourism and Economic Development and the Arlington Center for the Arts. The program includes live musical performances, works by local artists, and a food court with fare from local restaurants. Saturday night there will be more live music and dance performances in the Regent Theatre and a selection of short films curated by the Arlington International Film Festival. More information about the party and its performers can be found at www.arlingtonalivema.org.