Orange County rock icon Greg Topper performs with his band the first, third and fifth Saturday of each month at Pierce Street Annex, 330 E. 17th St., Costa Mesa. The free shows are from 5 to 8 p.m. and 21 and older only. This week's show features guitarist Albert Lee, who will join the band for its set. For more information, visit http://www.gregtopper.com.
The Newport Beach Retirement Community is hosting "Imagine Your New Best Friend," a pet adoption event from 9:30 a.m. to 3 p.m. at 1455 Superior Ave., Newport Beach.
Picnic and Open House
The city workers of Costa Mesa, their families and city residents are invited to a potluck event from 11 a.m. to 3 p.m. with free hot dogs, games and more at the Halecrest Swim and Tennis Club, 3107 Killybrooke Lane, Costa Mesa. No pets are allowed in the park. For more information, call (714) 557-7234 or visit http://www.halecrestpark.com.