Tuesday

Business After Hours, 5:30 to 7:30 p.m. at the Inn on Peaks Island. Free with cash bar, light food and live music.

Wednesday

Business After Hours, 5 to 7 p.m., at Man on Main, 103 Main St., Belfast. For details, visit www.belfastmaine.org or call 338-3808.

“Marketing for the 21st Century,” 8:30 a.m. to noon, five 30-minute free workshops presented by Nancy Marshall Communications. Held at The Senator Inn, 284 Western Ave., Augusta. Seating is limited. Register at www.marshallpr.com/register or call Juli Settlemire at 623-4177.

Thursday

OSHA Recordkeeping Class for Employers, 8:30 a.m. to 3:30 p.m., free, held at 570 Main St., Westbrook. To learn more and register, go to http://1.usa.gov/1nAmEHz. Reservations are required.

Portland Micros Kick-off Celebration, 5:30 to 7 p.m., reception and introduction to the newest micro-entrepreneurs from immigrant communities, free. Donations are welcome. Held at Think Tank, 533 Congress St., Portland. For more information, call 939-3800.

Sea State series: “Animals From Away,” 7 to 8 p.m., talk about effects of green crabs on Casco Bay shellfish, free, held at Gulf of Maine Research Institute, 350 Commercial St., Portland. Doors open at 6:30 p.m., free parking available. Seating is limited. To register or for details, email Sarah Longley at slongley@gmri.org or call 228-1699.