Phoenix Astronomical Society is 70 years old! Kids of all ages will celebrate with demos, activities, lectures and other starry fun. Artwork from local schools and free raffles throughout the night followed by a star party to gaze through the galaxies. Free. Paradise Valley Community College Black Mountain Campus, 34250 N. 60th St., Scottsdale. 5–10...

It’s happy hour with a wild side at the Phoenix Zoo! Guests 21 and older can sip and stroll select trails while enjoying craft brews, wine and food. Animal encounters, yard games, live music, entertainment and more! $10. 455 N. Galvin Pkwy., Phoenix. 5:30–8:30 p.m.

Celebrate German-style with three days of live music, brats, and beer and extra fun like dachshund races, keg tappings, karaoke, carnival rides and more. Free. Tempe Beach Park, 80 W. Rio Salado Pkwy., Tempe. See website for schedule.

Opa! It’s the longest-running, largest ethnic festival in the Valley! Food, music, dancing, art, activities for children and more at the Holy Trinity Greek Orthodox Community Center. $3; free for children under 12. 1973 E. Maryland Ave., Phoenix. 5 p.m. Oct. 12–8 p.m. Oct. 14.

Hundreds of Valley foodies, wine enthusiasts and the culinary curious will gather under the stars for a night of music, dancing and delectable tastings during the Muscular Dystrophy Association’s 18th Annual Taste of the Town. $65–85. Scottsdale Quarter, 15059 N. Scottsdale Rd., Scottsdale. 6–9:30 p.m.

Over 100 varieties of tacos will be available both days, all for just $2 each. Now in its 9th year, it's a taco-topia of epic proportions. Fifty restaurants dish out tacos while bars and beverage stations serve margaritas, cervezas, water and soda. Entertainment everywhere! $12 online; $15 at the gate. VIP tickets and tequila expo...

Held against the backdrop of Sedona’s breathtaking red rock vistas, the Sedona Arts Festival will present over 100 juried artists as well as live music, food and art fun for children. $10 in advance; $12 at the gate; free for children 12 and under. Sedona Red Rock High School, 990 Upper Red Rock Loop Rd.,...

Enjoy a night of food, drinks, and entertainment as Phoenix magazine showcases the best people and business that make our city colorful and filled with culture. Forty Valley restaurants will be represented at this benefit for the Leukemia and Lymphoma Society. $40–60. The Van Buren, 401 W. Van Buren, Phoenix. 8–11 p.m.

The Scottsdale Philharmonic will perform a free classical music concert in its mission to bring classical music to people of all ages. No charge. $15 for VIP seating; tax deductible. Scottsdale Bible Church, 7601 E. Shea Blvd., Scottsdale. 4–6 p.m.

Grammy Award winner, legendary musician and two-time Rock and Roll Hall of Fame inductee Graham Nash performs an intimate solo show of songs and stories. $45–75. Virginia G. Piper Theater, 7380 E. 2nd St., Scottsdale. 7:30 p.m.