FRIDAY-SUNDAY

Play to your heart’s content at Rocky Mtn. Pinball Showdown and Gameroom Expo. Hundreds of games, classic and new. Denver Marriott South at Park Meadows, 10345 Park Meadows Drive, Lone Tree. Play just for fun or in one of the tournaments. Buy your own pinball machine. Friday noon to 10 p.m., Saturday 10 a.m. to midnight, Sunday 10 a.m. to 5 p.m. Admission tickets: pinballshowdown.com

FRIDAY-SUNDAY

So familiar to veterans, Vietnam Helicopter Showcase, a traveling museum, this weekend, Wings Over the Rockies Exploration of Flight, 13005 Wings Way, Englewood. 10 a.m. to 4 p.m. Including a UH-1 Huey. Meet pilots, too. Friday 10 a.m.-3 p.m., Saturday 10 a.m. to 4 p.m., Sunday noon to 5 p.m. Tickets in advance: wingsmuseum.org

FRIDAY-SUNDAY

A weekend of science fiction and fantasy, MileHiCon 54, fills Marriott-Denver Tech Center, 4900 S. Syracuse, Denver, with CosPlay, robots, authors and activities. Guests of honor are author Ken Liu, artist Charles Vess, author Travis Heerman and toastmaster Kevin J. Anderson. Admission at the door $56, registration begins at noon Friday. milehicon.org

FRIDAY

Opening the 10th anniversary year of the Fort Collins Foodie Walk, 6-8 p.m. the third Friday of each month. This weekend the 10 participating businesses each introduce a new culinary treat. downtownfortcollins.com 

FRIDAY

Cue the music for Happy Hour Chamber Concerts – Twilight Zone. Baroque music of the season, supernatural poetry and more in live performances by Colorado Chamber Players, 790 S. Corona St., Denver, 6 p.m., (limited capacity), $20 advance/$22 door/$10 live stream. happyhourconcerts.org

SATURDAY-SUNDAY

Two final weekends end the season for the 16th Street Fair downtown between Tremont and California streets. 11 a.m.-6 p.m. Emerging arts and crafts artists. 16thstfair.com

SATURDAY

Go on an after-hours, 7 p.m.-midnight, ghost hunt in the Denver Firefighters Museum with the Rocky Mountain Paranormal Research Society to learn how the paranormal investigators find, or not, their scary prey. 1326 Tremont Place, Denver. Reservations required, $25, (303) 892-1436. Parental discretion advised.

SATURDAY

So much exciting dance when Flamenco Denver presents “Raices,” an opportunity to experience all of the palos styles from around the globe by a who’s who of that dance world. Newman Center for the Performing Arts, 2344 E. Iliff Ave., Denver, 7:30 p.m. Tickets $24-$70. tinyurl.com/34tu75e9

SUNDAY

Those aren’t Halloween costumes. This is Denver Pagan Pride Day celebrating their “darker time of the year” holiday, complete with a parade. All about Paganism, Magick, druids and more from the real thing. There’s trick or treating as well and there are costume contests for sure. Cheesman Park, 11 a.m. to 4 p.m. denverpaganpride.com

SATURDAY

Treat Street for the family is a fun day of trick-or-treating, a petting farm, HALLO-WEENIE dachshund races (2:30 p.m.), pumpkin painting, games, hayrides, beer garden, bluegrass music, food trucks and a family costume contest. $10 admission. 11 a.m.-4 p.m., Arapahoe County Scaregrounds, 25690 E. Quincy Ave., Aurora. arapahoecountyeventcenter.com

Oct. 22: Spooktacular — Family events with games, prizes, food and candy, Philip S. Miller Park, Castle Rock. 22: Treat Street — Safe trick-or-treating and family fun, 11 a.m.-4 p.m., with dachshund Hallo-weenie race at 2:30 p.m., Arapahoe County Fairgrounds, 25690 W. Quincy Ave., Aurora (Denver MSMD)

Oct. 23: Howl-a-Ween Pet Parade — With costume contest and Denver Animal Shelter on-site with adoptable dogs, 1-3 p.m., Denver Union Station Terminal Bar patio, 1701 Wynkoop St., Denver.