Wednesday

Business After Hours, 5:30 to 7 p.m., Mid-Maine Chamber event at Cancun Mexican Restaurant, 16 Silver St., Waterville.

Thursday

“Tidal Energy and Maine’s International Growth Opportunity,” 7:15 to 9:30 a.m., an E2Tech forum at Wishcamper Center, Room 102, University of Southern Maine, Portland. The cost is $15 for members and $25 for others. Register at e2tech.org/events.

“Supercharging Your Facebook Marketing,” 11:30 a.m., Maine Marketing Association Lunch and Learn program with Constant Contact’s Corissa St. Laurent at Portland Public Library, Rines Auditorium, 5 Monument Square, Portland. Lunch is included and the cost is $10 for members, $20 for nonmembers and $7 for students with ID. Register at www.mainemarketingassociation.org/events/#june.

Friday

Boston Architecture Tour, 7:30 a.m. to 8 p.m., fifth annual tour sponsored by Portland Society of Architects. The cost is $75 for members and interns and $40 for student members. Space is limited. To register or for more information, go to www.portlandarchitects.org.