In a variation on the usual Concerts in the Park tribute-band format, two young, unsigned Santa Clarita Valley rock bands will play one song each at halftime in the headlining set by legendary rock ‘n’ soul band Jack Mack & The Heart Attack at Central Park Saturday night.

Fronted by Valencia resident Mark Campbell on lead vocals and billed as “hardest working band in soul business,” Jack Mack & The Heart Attack are celebrating their 30th anniversary with a new album, “Soul Meeting,” and calling the Concerts in the Park show a big album release party.

Adding to the festivities are the SCV teen bands playing at halftime, Open the Coda and Blackout. Both are high-achievers in the “After School Rock” program for young musicians at Hubbadaddy’s Rehearsal Studio in Centre Pointe.

Open the Coda

Hubbadaddy’s is owned by Kevin Cloud, who was drummer with Jack Mack & The Heart Attack from 1988-1991 when they were the house band on Fox’s “Late Show with…” and he now heads the Hubbadaddy’s popular “After School Rock” program.

Rock/blues/soul band Open the Coda features long-time ASR students who formed as a quartet just a few months ago. Singer Melanie Parson, guitarist Josh Larson, bassist Zach Relles and drummer Trevor Thomas range in age from 14-17 years old, and are writing original material as well as performing choice covers. At Central Park, they plan to rock No Doubt’s “Just a Girl.”

Four of the five members of rock/metal band Blackout met and formed at Hubbadaddy’s two years ago: Kaden Borja (vocals), his brother Tanner Borja (drums), Jordan Dell (lead guitar) and Andre Lopez (lead guitar, backing vocals). The lineup became a quintet in spring 2011 when bassist Zach Relles joined up. They range in age from 11-16 years old. At Central Park, Blackout is set to perform Nickelback’s arrangement of Elton John’s “Saturday Night’s Alright for Fighting.”

Relles, playing with both bands, has been in the ASR program about three years total. The former SCV resident now lives in Ventura, and his parents drive him back to Santa Clarita each weekend for his ASR rehearsals.

Separately during Saturday’s concert, Cloud, along with Campbell and their friends Christy Calabro on guitar (Poison, Bret Michaels, Rikki Rockett) and Jerry Best on bass (Lion, Ronnie James Dio, Courtney Love), will perform a song to demonstrate the “Hubbadaddy’s Rocks” outreach presentations the four play at local elementary schools.

Those gigs are designed to introduce K-6 students to various instruments, styles of music, and the concept of playing in a band. Their most recent “Hubbadaddy’s Rocks” assembly was at Helmers Elementary.

Their song will most likely be a cover of Lynyrd Skynyrd’s “Sweet Home Alabama,” Cloud said.

After the presentation and the two songs by Blackout and Open the Coda, Campbell and Jack Mack & The Heart Attack will return to the stage to play the second half of their set.

Saturday’s show was put together by special arrangement between the headlining band, Cloud and Mike Fleming, a noted songwriter and musician who heads the city of Santa Clarita’s Arts & Entertainment crew and books the talent for the city’s popular summer concert series.

For more on Saturday’s concert, see the “Peeples Place at KHTS” blog at www.peeplesplace.com on Friday morning.