Photo by Paul Cortez.

FITNESS: At the “Trick or Fit” Fitness Party, you can spend the evening doing yoga, pilates, and NRGY!15™, “a high intesity workout based on 15 signature moves choreographed to amazing music that will reshape your entire body.” The Arts Walk at Monroe Street Market (716 Monroe Street NE) 6-8 p.m. Free, but a donation of a non-perishable food item to benefit DC Central Kitchen is strongly encouraged.

SINGING: The Halloween edition of A People’s Choir will feature songs including, “This is Halloween,” “I Put A Spell On You,” and “Love Potion Number 9.” Start warming up your voice now. Rock And Roll Hotel (1353 H Street NE) 7:45 p.m. Free

BEER: Head to Wicked Bloom DC Social Club for some beer and tacos as Atlas Brew Works launches Atlas Saison de Fete. $3 pulled pork tacos will come courtesy of DCity Smokehouse. (1540 North Capitol Street NW) 5 p.m.-1:30 a.m.