Don't know about "classic". But diners used to be my weekly jaunt here in South Bay for almost a decade. Not any more because with age you realize the quantity is too much and my drive to work changed (WFH). There's something special about going to your regular place, seeing the same servers, and them knowing your order before you say it. Probably the same in dinner restaurants but we don't repeat restaurants as often whereas the breakfast / lunch diner was weekly so very familiar (to both sides). Tried to switch places a couple of times just for experience but it never felt the same ... but you can make it work.