Mondaynite Jazz Orchestra (MoJO) provides the tunes for benefit dance at the Rockport Opera House, 6 Central St. Cost: $10; $15 couples. Space limited; for advance tickets, call 691-6867. Semi-formal attire requested; Ron Hawkes Photography on hand to take photos. Celebrity guests, cash bar and raffles. Benefits the Help Heat Homes Initiative. Sponsored by Mr. Tire, Midcoast Gym and Brooks Trap Mill.