After Google search revealed that applicant smokes and drinks, can we refuse to hire him?

Q. We did a Google search on someone we wanted to hire and we found several pictures of the individual smoking and drinking alcohol at bars. We had wanted to hire this employee for a position in which he will work closely with clients and now we are having second thoughts. We certainly do not want him to smell like smoke when he meets with clients. Is there any legal problem with not hiring him?