J looks at his first customer and pulls his wand out and points it at a butterbeer "Wingardium Leviosa" and levitates it to her. Still with the wand on the butterbeer he says "Engorgio" and the butterbeer gets bigger. "first five customers gets and extra large butterbeer , and i mean extra large" he said smirking "that should get more in here, he he he" he said to himself.