The bodyguard sees Rin coming, since David put his hot cocoa down so hard that it splashed over the sides and noticed them coming over. He tightens his grip on the pistol in his pocket and talks into an earpiece which sounds like gibberish to you . The man with the girls doesn't seem to notice David since he continues to laugh and talk with the girls at his table, but he moves his blazer slightly to the right so you see a concealed weapon at his right side in a holder.

(ooc) the bathroom is to the right of the man you are talking to. it is hard to get to due to the amount of people crowded in the club.(ooc)