There can be Number One in outlets, or in diners, or in revenue, TR is probably the latter.
They probably get quite a bit more revenue per table than say Applebies.
I've dined there or Longhorn a few times, total maybe ten? They seem OK to me. I don't really like steak places much.
I read somewhere Costco sells more wine than any retail outlet,but it's on a dollar basis, not bottle.