When the coffee shop closed , I moved over a few feet to sit in the adjacent hotel lobby ( the cute girl behind the counter at Tully 's told me that their free wireless stayed on all night and the hotel would n't mind my being there ) . After I 'd been writing for a while , the security guard came over and asked what I was doing . I told him , and he started quizzing me about my novel .
According to the above context, answer the following question.
Why did the security guard initially come over ?


I was writing in the lobby late .