8 a.m. to noon — 2013 Energy Summit & Fair at UNT Discovery Park, 3940 N. Elm St. Free event inclues panels on commuting and building design, an Energy Fair, vehicle displays and tours of UNT’s Zero Energy Research Laboratory house. Visit http://burgess.house.gov/energysummit .
9 to 11 a.m. — Clear Creek Sustainability Workshop Series: Vermiculture at Clear Creek Natural Heritage Center, 3310 Collins Road. Demonstration workshop taught by Don Edwards will teach participants how to get started with worm composting. Call 940-349-8230 or visit www.clearcreekdenton.com .
9 a.m. to 1 p.m. — Fifth annual Lake City Misfits Car & Truck Club Show, benefiting Faith Presbyterian Hospice, at Jim McNatt Toyota Honda Scion, 4050 S. I-35E (exit 462). To enter a car, truck or motorcycle, entry fee is $15 in advance or $20 at the event. Gates open from 7 to 10:30 a.m. for entrants. Visit www.lakecitiesmisfits.com/events.html or call Brad Soper at 214-796-3002.
9 a.m. to 2 p.m. — American Red Cross community blood drive in the gym at St. Andrew Presbyterian Church, 300 W. Oak St. Potential donors must have a photo ID, be at least 17 and weigh at least 110 pounds. Walk-ins are welcome. Call 1-800-RED CROSS or visit www.bloodisneeded.org and search by ZIP code.
10 to 11 a.m. and 2 to 3 p.m. — Vanishing Prairie guided hikes at the Johnson Branch Unit of Ray Roberts Lake State Park, on FM3002, 7 miles east of I-35. Meet at Pavilion 1. Free with regular park entrance fee of $7 for ages 12 and older. Call 940-637-2636.
Noon to 3 p.m. — First African Violet Society of Denton annual workshop and sale, in Erwin Hall at First Presbyterian Church of Denton, 1114 W. University Drive.
10 a.m. — Story Time at South Branch Library, 3228 Teasley Lane. Stories, songs, puppets and more for children ages 1-5 and their caregivers. Free. Call 940-349-8752.
2 to 3 p.m. — “Texas History for the Trivia Buff,” a lecture by Tom Tweeddale, at South Branch Library, 3228 Teasley Lane. Discussion covers little-known facts about Texas history, from the Texas Revolution through Reconstruction. Free. Call 940-349-8752.
4 to 5 p.m. — Science Adventures for ages 8-12 at Emily Fowler Central Library, 502 Oakland St. Investigate physical reactions with interactive scientific experiments. Free. Call 940-349-8752 to register.
7:30 to 9 p.m. — Aubrey’s free Music in the Park series presents Blacktop Gypsy at the festival grounds at 301 Main St. Bring lawn chairs and blankets. Call 940-343-1313 or visit www.keepaubreybeautiful.org .
Denton Poets’ Assembly meets from 10 a.m. to noon on the third Saturday of the month at Emily Fowler Central Library, 502 Oakland St. Free and open to the public. Visit www.dentonpoetsassembly.weebly.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.
Rebuilding: Divorce/Relationship Recovery and Solo Parenting group meets at 4:30 p.m. on the first and third Saturday of each month at First Baptist Church of Corinth, 3033 Meadowview Drive. Group meets through May 19. Contact Louise Wilson at 940-272-2515 or email@example.com .
To tell us about your event or meeting, visit DentonRC.com and click on “Let Us Know” for our online forms; e-mail to firstname.lastname@example.org ; fax to 940-566-6888; or mail to Page 2 Calendar, Denton Record-Chronicle, 314 E. Hickory St., Denton, TX 76201.