“Overview of Geothermal Technologies in New England – Basic Concepts & Case Studies,” Maine Real Estate and Development Association, breakfast seminar, Starting at 7:30 a.m. Tuesday at Eastland Park Hotel, 157 High St., Portland. The cost is $50 for members and $60 for nonmembers. Call 874-0801 for more information. 

DEPA Business After Hours, Downeast Pride Alliance networking meeting for gay and gay-friendly business people, 5:30 to 7:30 p.m. Tuesday at The Pearl, 444 Fore St., Portland. No fees. All are welcome. Call 772-3599 for more information. 

“The Art of Bridge Design: The Best in Integrating Architecture and Engineering,” first in the new Architalx lecture series, 3 p.m. Tuesday at Hannaford Hall, Abromson Center at University of Southern Maine, 88 Bedford St., Portland. Tickets are $10 at the door. 

Basic On-Site Wastewater System Installation, workshop covering the design, permitting, construction and inspection process under Maine rules, 8 a.m. to 4 p.m. Wednesday at Lincoln Center for the Arts and Education, Rockland. The fee is $75 and includes lunch. To register call the Joint Environmental Training Coordinating Committee at 253-8020. 

Seasoned Worker Forum, 9 a.m. to noon Tuesday at the Hampton Inn, 425 Kennedy Memorial Drive, Waterville. Free. For more information or reservations, call Mid-Maine Chamber of Commerce at 873-3315. Space is limited. 

Open House, 4 to 7 p.m. Thursday, celebrating 19 years in business and a look at the newly renovated location; also refreshments and giveaways. Grapheteria, 143 Kennebec St., Portland. 

Penobscot Bay Regional Chamber of Commerce annual dinner and awards ceremony will be held at the Samoset Resort in Rockport on April 17. Tickets are $55 per person and the reservation deadline is Thursday. Call Shari Closter at 596-0376, ext. 22 for details or reservations. 

Maine Media Women, with speaker Julie Stackpole of Thomaston, who will discuss the history of hand-bound books. Guests welcome. 9:15 a.m. Saturday at Rockland Congregational Church, 180 Limerock St., Rockland. Suggested donation is $3 for members and $5 for nonmembers Call 563-8377 for details. 

Intro to Masonry Heaters, free workshop from 9:30 to 10:30 a.m. Saturday. Pre-register at info@shelterinstitute.com or call 207-442-7938. Shelter Institute, 873 Route One, Woolwich. 

“Speak up for a Child,” Maine Court Appointed Special Advocate free training 8 a.m. to 4 p.m., April 6-9, at Maine Judicial Center, Augusta. Volunteers typically handle just one case at a time until the child is placed in a safe, permanent home. Training, supervision and ongoing support are provided. For more information call Karen Grossman at 287-7060 or visit www.courts.state.me.us/maine_courts/specialized/family/casa