Gallery 1988 on Melrose is a mecca for pop culture-themed art—from its annual “Under the Influence” show, which pays tribute to Stan Lee and the Beastie Boys to series that include “Cult Movie Art,” video game posters and more.  Opening Friday night and continuing through April 28^th, it’s featuring “Just Like Us”—artwork by Mike Mitchell.  Anyone whose work includes a bloody, knife-wielding Care Bear and a unicorn with a buttered corncob horn is definitely a must-see.