lionlove,
when did they start saying "going to the hill?" i know i graduated from muhlenberg 5 years ago...but we NEVER said that!!! and we had more fraternities there then!!!!
personally, i blame the decline in greek participation at berg to the sophomore deferment. i rushed in 1995 when berg first started the sophomore deferment and a mandatory 4 week pledge period. many people didn't want to rush because they already had their "groups" to hang out with.
i don't know much about the greek systems at the other area schools, other than i had some fun up on the hill at lehigh