Rose McGarry owns a pet dog and 11 ducks. And she adores filet mignon too much to be a vegetarian. But when she ate lunch recently at J.J. Boomers on Pawtucket Boulevard, she didn't like what she saw. Near the bar was an arcade-type game featuring a 50-gallon tank with flashy lighting and sound effects. For $2, a customer can operate a miniature crane much like the popular stuffed-animal amusement seen in restaurants and carnivals. In this case, though, patrons troll the tank for live Maine lobsters. It's called Lobster Zone, and if the players are skillful enough to grab...