How can I remove adhesive/glue from bricks?
Yeah, that's a tough one. You don't want to damage the brick, but the adhesive has already done that.
What I would suggest would be an angle grinder to flatten the adhesive, and then painting the bricks. If painting them all isn't ideal (i.e. you want bricks, not a painted wall), pick some brick-like colors and paint the ones that are damaged. As long as the paint is matte, it shouldn't be terribly noticeable in the room. People will chalk the color variations up to the brick schema.