Casino foes are hosting a panel discussion with former Gov. Michael Dukakis and former Attorney General Scott Harshbarger as they try to rally opposition to expanded gambling in Massachusetts.
The evening forum is scheduled for Thursday at Faneuil Hall in Boston.
It will also include City Year co-founder Alan Khazei, who has made his opposition to casinos a theme in his campaign for the late Edward Kennedy's Senate seat.
The forum comes as lawmakers weigh different options for expanded gaming in Massachusetts, including allowing slot machines at race tracks or licensing resort-style casinos.
Gov. Deval Patrick and top Democratic leaders say they support casinos.
Lawmakers are expected to take up the issue after they return in January.