Pontoon boats appeared decades ago as slow-moving, bare-bones party barges and progressed to fast, smart-handling boats with deluxe accommodations. Premier’s Grand Entertainer is an amalgam of that evolution, delivering 50-plus mph top speeds and all the comforts of a favored bistro. No, really: This 29-foot-5-inch ’toon sports a three-stool bar, complete with overhead glass racks, cold stowage and a grill. Premier even installed purse hooks for the ladies. All that’s missing is a balladeer strumming a guitar and a few ficus trees. Though given the Grand Entertainer 290’s size and price, if you can buy it, chances are you’ve the wherewithal to fill in the blanks.