To me, it looks like an impatient customer seating himself at the low-class diner and then waiting for service. He appears to be looking around while considering his options and also thinking, “Isn’t somebody gonna come take my order? What do I have to do to get some 
service around here?!”
When my cat wants food, he will sometimes sit quietly at his “empty” bowl (even if it’s got a few pieces of kibble in it) and wait for service, or he’ll take a seat in the room where I am but be facing the door ready to stand and walk whenever I decide to move the slightest bit in the direction of where he eats.