1. The Canadian-American Club hosts a Scottish Fiddle Session tonight.
2. A lecture about whether pesticides affect our health will be presented free at the Watertown Free Public Library tonight.
3. The Watertown High School boys' soccer team takes on Newburyport in the North Section semifinals today in Lynn. NOTE: The game has been moved to Saturday at 12:30 p.m.
4. Arsenal Wine & Spirits hosts a tasting of South African wines.
5. The Senior Center hosts a free hearing screening this morning.