There are MANY fraternities at Lehigh, and that greatly increases you chances of finding one with “your type of people” in them. Yes there are more laid back fraternities. (never called “frats” there, though) Some party harder than others, but you will definitely get a feel for the personalities of the individual houses once you’re on campus. The known sports houses tend to be the bigger partiers. I think you can definitely find your niche!