My D is a student at Lafayette. Right now there are only 3 frats on campus (I believe my D said a fourth one is petitioning to get back on campus but that won’t be immediate). You absolutely do not need to be part of a frat to have a good social life. If Greek life isn’t your thing, it won’t be a problem at all. There are many ways other than Greek Life to find social groups (freshman dorm, classes, activities etc.).