Grouting interior Brick Faced Wall

Hello All. I got a bright idea to put brick facing on a concrete wall in my basement. I used Liquid nails to attach the veneers to the wall. It came out GREAT! but now my problem is "How do I grout it?" I have heard of people using grout bags to place the grout evenly between the brick but what kind of grout shoud be used? I really don't want to seal my brick because the rough look is perfect for my basement/pub decor. I would really Love any information anyone could give to help me or direct me to a solution.