As my labwork took most of my time (and energy) I was unfortunately not present in the activities arranged. There are some forums that give updates of whats going on, one of them being EPFL XChange wich caters to all exchanges students present at EPFL (https://www.facebook.com/xchange.esnepfl).
Most of the activities that I was a part of was things done outside of school.
Here are some recomendations:
Gruyere- kind of the most see city for cheeselovers. We went by car but there is great communication with public transport.
Alps- Never stood on a pair of skies in my life prior to this experience. Something everyone should do. Swizz alps are gorgeous and you have a lots of fun. I went to Villars-Sur-Ollon which is a beautiful resort that is not to expensive compared to other more popular resorts (still expensive though).
Geneve- Go there just to walk around in the city. Make sure to catch the big events such as the international car show (!) and festivals.
Rome- The best thing with Switzerland is that its close to eveyrthing. Book a trip during the easter holiday and enjoy Rome at its finest.
Evian- We took the boat over to Evian (France) and walked around in the little city. There are some great bars and wine shops. There is also a carnival during spring.