I don’t have specific information on “Mayrouba Club” in my database up to my last knowledge update in September 2021. However, I can provide you with some general information about how sports leagues and promotions work in basketball.
In many basketball leagues around the world, including the Lebanese Basketball League (LBL), there are typically multiple divisions or tiers. Teams compete in lower divisions with the goal of winning their respective championships to earn promotion to higher divisions.
It seems that Mayrouba Club won the Lebanese second division basketball championship in the 2015-16 season, which would have earned them promotion to the top division, the LBL, for the 2016-17 season. This is a common system in sports where teams can move up or down in the hierarchy of leagues based on their performance.
If you have more specific questions about Mayrouba Club or the LBL, I recommend checking the most recent sources or the official website of the Lebanese Basketball League for the latest information.