Usually attended only by nervy fledgling standups and neighborhood inebriates who resent the incursion, open-mike nights often have the feel of a glum joke workshop — which is why emcee Kevin O'Brien likes to mix things up, kicking off each comedy open mike at the Matchbox with a throaty rendition of "America the Beautiful." Curating the lineup like he would a mixtape and doling out "bag of human garbage" and "beer with ol' Kev" awards to their deserving recipients, O'Brien proves that just because anyone can sign up to perform doesn't mean that showmanship should be an afterthought. The Matchbox draws the best ratio of newcomers to seasoned pros, which means that spectators have the best chance to see a hilarious, chaotic comedy show for free, particularly during warmer months, when the program takes over the patio.