The Valencia Park/Malcolm X Branch Library's Performing Arts Center hosts the third annual “Say It Loud” theatrical production to benefit the library's children's book fund, 7 p.m. Saturday. $5 to $20 donations suggested. Information: (619) 527-3405 or sandiegolibrary.org.
San Diego Junior Theatre presents “Really Rosie” at the Casa del Prado Theatre in Balboa Park, tomorrow through July 13. Recommended for all ages. Tickets cost $8 or $11 for children younger than 14 and seniors; $10 or $13 for adults. Group rates available. (619) 239-8355 or www.juniortheatre.com.
The San Diego bloodmobile will accept donations from 9 a.m. to 3 p.m. Saturday at HomeTown Buffet, 10660 Camino Ruiz, Mira Mesa. Anyone who is at least 17 years old, in good health and weighs at least 110 pounds may be eligible to give blood. A good meal is recommended before donation. Information: (800) 4MY-SDBB or sandiegobloodbank.org.

Datebook is compiled by David Berlin. Send items at least 10 days before desired publication date to: Datebook, The San Diego Union-Tribune, P.O. Box 120191, San Diego, CA 92112-0191; or e-mail to
fyi.city@uniontrib.com. Publication of items is not guaranteed. Questions: (619) 498-6626.