Greater Rochester Boat Show (Thursday through Sunday)The Rochester Riverside Convention Center will be full of hundreds of boats starting Thursday. Rochester Polar Plunge (Sunday)Hundreds of people will plunge into Lake Ontario’s frigid waters on Sunday to raise money for Special Olympics New York. Registration begins at 9 a.m. and the Rochester Polar Plunge at Ontario Beach Park begins at noon. Last year, over 2,000 people took part in the polar plunge to raise $350,000 for Special Olympics competitions. New this year, there’s the “Cool School Mobile Polar Plunge”, intended for students in high school or younger.