I think people are answering the question as they go along. From my own regional knowledge and experience any tournaments that are WKF sanctioned or run by associations that follow WKF rules for tournament will have mats (usually of the puzzle mat style). The mats are now all blue with the exception of the jogai strip (out of bounds) which is red. However, even though these clubs might be a member of a State or Provincial association which follows WKF rules, they may have style or organization tournaments (ISKF, JSKA, etc) that do not necessarily follow the WKF methodology or rules and may not have mats.
