Pop band Walk the Moon to play 2015 WWDC Bash

The event is taking place at Yerba Buena Gardens and is open to any WWDC attendee age 18 or older. The Walk the Moon song "Shut Up and Dance" was played during Monday's Apple Music announcement — as a part of the Bash promotion, Apple is also giving attendees two free songs by the band.

The Bash presents developers with an opportunity to socialize and have fun during a conference mostly dedicated to learning design and programming for Apple products. Past performances have included acts like Bastille and Vampire Weekend, who have also been go-tos in Apple marketing.

WWDC 2015 began with Monday's keynote event. Labs and development sessions will continue until the very end of the conference, scheduled for 5 p.m. on Friday.

Other announcements during the keynote included OS X El Capitan, iOS 9, and watchOS 2.