Voters in two more Massachusetts communities are set to decide whether they want to host gambling facilities. A referendum is scheduled for tomorrow in West Springfield on Hard Rock's proposal to develop a casino at the site of the Eastern States Exposition. If voters approve, Hard Rock will likely be competing with MGM Resorts in Springfield and Mohegan Sun in Palmer for the sole western Massachusetts resort casino license.  If the vote is no in Westside, then the issue is over in that community.