room set up question?

Getting my room ready to set up my new speakers and had a quick question. I understand the recommendation of a triangle set up (distance between speakers to listening spot). My question is if we are setting up with more than one listening position like a sofa etc would we just use the triangle as a base line and move are seating back until most of the seating area falls between the center of the distance between the speakers? Or if this idea is totally wrong would I push the speakers closer to the side walls and toe them in towards the listening position?