Rock Band Slacking is a Puzzle game. You can play Rock Band Slacking in your browser for free. Sarah joined a rock band as the lead singer and guitarist and her band, The Slackers, are performing in their very first concert! Sarah can`t wait to get on stage, but all the fame is getting to her head and she wants to have some fun with her new fans. Will she rock out or will her act get booed off stage? Control: Use your mouse or keyboard to complete the activities. Help Sarah slack at the rock concert, but if the drummer looks over press the X to keep rocking.