is keeping up his clean living
after his stint in rehab
, but it doesn't mean he's missing out on fun. Recently, the actor attended the Crash Kings concert at L.A.'s Troubadour. Butler appeared to arrive at the rock show solo – and he abstained from alcohol and stood in the back of the venue. Though he was on his phone for a good period of time, he was extremely polite and chatted with fans. He also made a little eye contact with a tall brunette during the show, according to a fellow audience member.