@Imran ********
well, if you have a U.S. passport, you will get stamped into Thailand for another 60-days stay permit. The two visa-exempt entries are definitely possible for two times in a row. The 7 days your fiend mentioned, is an extension refusal being issued INSIDE Thailand, not at the border. After so-and-so many days inside Thailand, when an Immigration officer thinks you have misused the touristic entries for a longstay, he will refuse to issue another extension, and stamp you "application denied, you have 7 days to leave the kingdom". Your friend simply confused two different things