Every Wed. & Mon. Runners of all abilities invited to join a beginner or advanced 3- to 5-mile group run, followed by socializing at a downtown coffee shop. 6:30 p.m., meet at the Kerrytown Clock Tower. Preregistration requested at meetup.com/a2runners. Free. [email protected].  

Sept. 14 & 28. Bruce Sagan leads an acoustic jam session devoted to traditional music from Sweden and Norway. All instruments welcome, no experience necessary. 7:30–9:30 p.m., location TBA; email [email protected]. Free. 

Every Mon. Performances from up to 15 aspiring stand-up comics from around the state. Local comics emcee. Age 21 & up only. Free candy. 8–9:30 p.m., 208 S. First St. Free. (734) 996–8555.

Every Sun., Tues., & Wed. Runners of all abilities invited to join a run of 3–5 miles along varying routes from different locations. Rain or shine. Dozer Coffee (7 a.m. Tues. & 8 a.m. Sun.), 112 Jackson Plz., (734) 929–9022 & Fleet Feet (7 p.m. Wed.), 123 E. Liberty, (734) 769–5016. Free. fleetfeetsemichigan.com.

Every Tues.–Sun. All age 6 & up invited into the museum’s labs to use scientific tools and museum specimens. The newest program lets participants try out simulated snake senses (sight, hearing, and smell) to experience the world as if they were a snake. No live snakes. 11 a.m.–3 p.m., 1105 North University. Free. (734) 764–0478, ummnh.org.

See 27 Sunday. Today: “Water Management Lightning Panel” (1–2 p.m., Weiser Hall, 1010), presentations by U-M researchers TBA, followed by Q&A. Also “50 States of Sustainability” (5:30 p.m., Palmer Commons, 100 Washtenaw Ave.), a screening of an episode of a PBS series highlighting communities developing solutions to environmental challenges, followed by a panel discussion by U-M faculty and sustainability practitioners. 1 p.m. & 5:30 p.m.

Every Tues. All invited to play the classic word game, using the 5th-edition Scrabble dictionary. Bring your own set, if you like. 3:30–8 p.m., Arbor Brewing Company Corner Brewery, 720 Norris, Ypsi. Free. [email protected], meetup.com/ann-arbor-scrabble-meetup.

Every Mon.–Thurs. (except Sept. 7). The U-M’s highly disciplined 200+ member marching band or sections thereof can be seen and heard practicing on the new Elbel field, across the street from the old Elbel field. All welcome to find a spot in the bleachers and get a sneak preview of upcoming halftime shows. Rehearsals usually last 1–2 hours. 4:45 p.m., new Elbel Field, Hill at Fifth Ave. Free. (734) 764–0582.

Every Tues. Moderate-paced ride, 20 to 30 miles, along the less-traveled roads west and north of Chelsea. See aabts.org for weather cancellations or delays. 5 p.m. sharp, meet at Aberdeen Bike and Outdoors, 1101 Main, Chelsea. Start location occasionally changes. Free. (734) 662–0205.

Every Tues. All invited to play board games, assemble a puzzle, paint miniatures, or try a tabletop role-playing game, all in a friendly, welcoming atmosphere. Also, at 6 p.m., RPG One Shots, introductory games of different tabletop role-playing games perfect for beginners, finished after one session (see website for this week’s game, preregistration strongly encouraged at sylvanfactory.square.site). 5 p.m., 2459 W. Stadium. Free. (734) 929–5877, sylvanfactory.com.

See 27 Sunday. Today: “Water Management Lightning Panel” (1–2 p.m., Weiser Hall, 1010), presentations by U-M researchers TBA, followed by Q&A. Also “50 States of Sustainability” (5:30 p.m., Palmer Commons, 100 Washtenaw Ave.), a screening of an episode of a PBS series highlighting communities developing solutions to environmental challenges, followed by a panel discussion by U-M faculty and sustainability practitioners. 1 p.m. & 5:30 p.m.

Sept. 21 & 29 (different branch locations). Adults and teens invited to learn the basics of needle felting with wool, then make a small sheep (Sept. 21) or ghost (Sept. 29). 6–7 p.m., AADL Pittsfield (Sept. 21) & AADL Downtown (Sept. 29). Free. (734) 327–8301.