Use social media platforms to create an optional page/s to follow, so that everyone visiting campus knows who and what events are on in Alex Square. It does more than posters and ensures that no one misses out. Updated daily or weekly. It's free. It's convenient. It's easy. It creates business and support for stalls and events, whilst maintaining relationships between students and keeping everyone in the know, cheaper, easier, faster and overall more efficient than paper. (It may also be a good selling point for newer customers to the Square, knowing their products/services can reach a wider audience and get them returning from a higher outcome.) I can't see any negative outcomes, the events will need to be managed by someone anyway, it's just a way of sharing that information that is quick and easy.