Wondering what you can possibly do to change our country’s loosey-goosey gun laws in the wake of the Newtown school shooting, the Aurora theater shooting, and grisly public shootings in Seattle, Portland, Orlando, Phoenix, and New York City (not to mention the everyday acts of gun violence that barely crack the news cycle)? Here’s your chance to find out. Join politicians, public-health officials, and mental-health experts as they discuss the best evidence-based approaches to quell gun violence in Seattle, King County, and Washington State. (Town Hall, 1119 Eighth Ave, townhallseattle.org, 7:30 pm, $5)