8:30 a.m. — Health Insurance Marketplace enrollment event at Health Services of North Texas, 4310 Mesa Drive. Drop in, or schedule an appointment by calling 940-381-1501, ext. 1016.
8:30 to 11 a.m. — Nature photography workshop at the Johnson Branch Unit of Ray Roberts Lake State Park, on FM3002, 7 miles east of I-35. Elizabeth Malmberg will discuss different camera settings, lighting and nature photography basics. Single-lens reflex and point-and-shoot cameras with multiple settings are recommended. Free with regular park entrance fee of $7. Register by calling 940-637-2294.
9 a.m. to 1 p.m. — Denton Senior Center open house at 509 N. Bell St. Guests can tour the center and participate in dance, exercise, art and other classes. Call 940-349-8720.
10 a.m. — “The Greenbelt Experience” at the Isle du Bois Unit of Ray Roberts Lake State Park. Meet at the Elm East parking area of the Greenbelt Corridor Trail, off FM455 in Pilot Point, for a moderate to easy 2-mile hike. Free with regular park entrance fee of $7 for ages 12 and older. Call 940-686-2148.
1 to 3 p.m. — Voter registration event at Golden Triangle Mall, 2201 S. I-35E. Register to vote, or update your name or address information.
1 p.m. — Altered Cigar Box Class at SCRAP Denton, 215 W. Oak St. Turn a cigar box into a personal memory box, shrine or purse. Second session is on Jan. 25. Cost is $10, box and papers provided. Visit www.scrapdenton.org.
2 to 3 p.m. — Local author Jack Pettie will share details from his new book, Ruins of a Rose, at North Branch Library, 3020 N. Locust St. A question-and-answer session and book signing will follow. Call 940-349-8752 or visit www.dentonlibrary.com.
2 to 3:30 p.m. — “Lincoln and Emancipation,” a talk by UNT history professor Richard McCaslin, at South Branch Library, 3228 Teasley Lane. Free. Call 940-349-8752 or visit www.dentonlibrary.com.
3 to 4 p.m. — “This Year I Will,” a workshop led by life coach and motivational speaker Maru Iabichela on how to stay on track with your goals for 2014, at Emily Fowler Central Library, 502 Oakland St. Free. Call 940-349-8752 or visit www.dentonlibrary.com to register.
7:30 p.m. — Denton Community Theatre presents Three Tall Women by Edward Albee at PointBank Black Box Theatre, 318 E. Hickory St. Tickets cost $15. Call 940-382-1915 or visit www.dentoncommunitytheatre.com.
Alcoholics Anonymous meets from 6 to 7 p.m. at Rock Hill Cowboy Church, 3000 Rock Hill Road in Aubrey. Call 940-391-5805.
Grupo 18 de Marzo Alcoholicos Anonimos meets from 7 to 8:30 p.m. at 100 W. Oak St. Call 940-231-9759.
Co-Dependents Anonymous, for people who desire healthy and loving relationships, meets from 10:30 to 11:30 a.m. at Denton Unitarian Universalist Fellowship, 1111 Cordell St. Call 940-320-2095 or 972-623-7423.
Compulsive Eaters Anonymous meets at 8:30 a.m. at Trinity United Methodist Church, 633 E. Hobson Lane. Call 940-387-9526.
Lupus Foundation of America support group meets from 2 to 3:30 p.m. at North Branch Library, 3020 N. Locust St.
Shalom Today group of Alcoholics Anonymous meets at 9 a.m., 11 a.m., 1:30 p.m., 6 p.m. and 8 p.m. at 311 S. Locust St. Call 940-383-8252.
Show Me group of Alcoholics Anonymous meets at 9 a.m., 10:30 a.m., noon, 8 p.m. and 10 p.m. at 1622 W. University Drive, Suite 104. Call 940-566-9989.
Whole New Deal Narcotics Anonymous group meets at 7:30 p.m. at St. Andrew Presbyterian Church, 300 W. Oak St. Call 940-898-0747.