More times than not, when one sticks to its beliefs things end up working out. In the case of the Brentwood, Missouri-based Immerse showroom, a division of St. Louis-based Atlas Supply, sticking to its beliefs has been nothing short of spectacularly successful. Immerse, founded less than eight years ago, is a trades-only showroom that caters to a vast swath of local designers, builders, bath and kitchen professionals, remodelers, and plumbing contractors…