"A Naughty Bash": Featuring Naughty by Nature, Poison Clan, Conscious Daughters and La Snow & LaPacho, Friday, the Groove. Tickets $18.50 in advance, for ages 15 and up. Charge by phone at 545-4000 or 800-333-3388. Or call 596-BIGG (596-2444).
"Med Mele": Slack-key guitar concert with the Peter Moon Band, Martin Pahinui, the Kipapa Rush Band, George Kuo and Dennis Kamakahi, 4 to 9 p.m. Saturday, Bishop Museum's Great Lawn. Fund-raiser for the UH School of Medicine. Tickets $12 in advance, $15 at the door, available at the UH Campus Center, Tower Records and Hungry Ear. Call 956-8300.
Orchestral music: The Allegro Concert Orchestra and the Mid-Pacific Strings perform, 6:30 p.m. Saturday, Mid-Pacific Institute's Kawaiahao Theatre, first floor. This may be the student ensemble's final appearance. Admission $2 general, $1 students and seniors, free for Mid-Pacific families. Call 955-3439.
"On the Light Side 2" concerts: The Repertory Singers of Hawaii perform comedic, operatic and show tune vignettes, 7:30 p.m. Saturday, Atherton Performing Arts Studio, Hawaii Public Radio. Program includes Menotti's "The Telephone" and Sundgaard's "Gallentry." Tickets $12.50. Call 955-8821. Repeats 4 p.m. Sunday.
49th Annual Music Festival: The Oahu Band Directors Association presents performances by students Saturday and May 11 at the Pearl City Cultural Center. The 9th Grade Select Band and the High School Select Band perform 8 p.m. Saturday. The 7th Grade Honor Band, 8th Grade Select Band and High School Select Band perform 7:30 p.m. May 11. Tickets $5 general, available through participating band members or the box office. Free admission for children 5 and younger.
Israel Kamakawiwo`ole in concert: 7 p.m. Saturday, Ke`elikolani Auditorium, Kamehameha Schools. With the Kamehameha Schools Orchestra, Hawaii Youth Opera Chorus, Cool Reign, Colleen Nomura and others. Tickets $10 general, $7 students, $5 Kamehameha students. Call 842-8380.
311 and Voodoo Glow Skulls in concert: 8:15 p.m. Saturday, the Groove. Doors open 7:30 p.m. Tickets $15.50, available at Hungry Ear stores, Tower stores (Kahala, Pearl Kai and Kapiolani Video), Pearl Harbor Bloch Arena and ITT Outlet at Kaneohe MCBH. Call 947-CLUB (947-2582).
Keiki Kani Choir: Children's performing group presents "Talk to the Animals," 1:15 p.m. Sunday, Pearlridge Center, Uptown. The choir also performs at the Aloha Tower Atrium 4 p.m. May 11; Ala Moana Centerstage 2 p.m. May 12; and Honolulu Hale 4 p.m. June 22.
Hawaii Youth Symphony: Spring Concert features Youth Symphony I and II, Concert Orchestra and Concert Strings, and harpist Constance Uejio, 4 p.m. Sunday, Blaisdell Concert Hall. Program includes selections from "Phantom of the Opera," Dukas' "Sorcerer's Apprentice" and the Overture to "Candide." Tickets $10 general, $5 students and seniors. Call 941-9706.
Piano recital: Paul Badura-Skoda performs, 4 p.m. Sunday, Academy Theater. Program includes Haydn's Sonata, Op. 52, and Beethoven's "Waldstein" sonata. Tickets $25 general, $20 students and seniors. Call 532-8700. Badura-Skoda conducts a master class 6:30 p.m. Tuesday. Audience admission $5.
Chamber Music Hawaii concert: "Strings, Winds, Piano & Voice," 7:30 p.m. Monday, Academy Theater. Program includes De Falla's "Harpsichord Concerto" and Grantham's "Lascivious Love Songs." Tickets $15 general, $13 seniors and students. Call 532-8768.