Hearing rock music live can infuse listeners with adrenaline, unlike hearing smooth jazz in an elevator or hearing the silence after an elevator has crushed a smooth-jazz quartet. Enjoy the sonic excitement of heavy metal with today's Groupon, which gets you one ticket to see Deep Purple, with special guest Joe Satriani, at the Sleep Train Pavilion at Concord on Saturday, June 25, at 7 p.m. Doors open at 6 p.m. Choose between the following options:

• For $24, you get a ticket for seating in sections 201–209 (a $38.50 value before fees, or up to a $49 value online, including all ticketing fees).
• For $41, you get a ticket for seating in sections 101–107 (a $68.50 value before fees, or up to an $82.90 value online, including all ticketing fees).

The hard-rock pioneers of Deep Purple bring their hallowed brand of musical thunder to the Sleep Train Pavilion at Concord as they continue their march through musical history. The group of tunesmiths responsible for hits such as "Smoke on the Water" and "Woman from Tokyo," Deep Purple wields a reputation as one of the world's loudest bands, giving eardrums the exercise they just can’t get from hushed performances of pantomimed opera. Virtuoso guitarist Joe Satriani will add his rock 'n' roll sounds into the mix, introducing complex new flavors to the aural stew. Purchase up to eight of today’s deal and treat rival bobsled teams to a night of riff-centric revelry and high-decibel bonding.

Designed by famed architect Frank Gehry, the Sleep Train Pavilion at Concord sports ample outdoor room for toe-tapping, finger-snapping, and air-guitaring. Seating will be assigned on a first-come, first-served basis at a Groupon redemption table located near the box office. Today's deal includes general-admission parking, allowing guests to safely stow horseless carriages and bioengineered horse-and-carriage hybrids during the concert.