We ordered the "Surf & Turf appetizer for 2" at Coral Reef a while back. It was exactly two shrimps and two one-inch square pieces of beef. It would not be a decent entree for a child -- let alone two adults! And, dh and I eat light meals and often share.
We recently shared the appetizer platter at Kouzinna as our entree and it was fine for two since we also had a couple of soups, the pita bread platter with dipping sauces, a couple of desserts and some wine -- so appetizers for two can work as entrees, but certainly not the one we were served at Coral Reef!