Carter gives David a smile when he sits down next to him, they don't say anything at first because they really don't need to. Which is nice, having someone he's so close to that they can sit and enjoy each other's presence and energy.
Eventually Carter motions towards David's drink, "That smells good. What is it?"
Of course they were! ;)
Eventually Carter motions towards David's drink, "That smells good. What is it?"