Of all the chains, Mastro's is my favorite. When you walk through that door you can smell that aged beef aroma...damn, now I need to make a reservation for next week.
My favorite restaurant is Lawry's. I don't know if it counts as a steak house. I've been going to the Beverly Hills location for 35 years. On a rare occasion (pardon the pun), you can get a medium-rare end cut which, in my opinion, is the best tasting cut of beef out there. Love their salad and mashed potatoes too.