Although I can see the benefits of having a large chapter with 150 people or more, there are also benefits of having a smaller chapter. I'm in a small chapter and I know we all know each other very well, my class is very close as well. I have a friend who is in a huge chapter down south and it tends to be a lot more clique-y according to her, than my chapter, simply because of all the people. Also small chapters everyone gets a chance to do some sort of leadership position in the chapter eventually. I know sometimes in a larger chapter girls don't get a chance to participate right away and they sometimes get disinterested after they get initiated. Big chapters can always find girls to go to events however, I know at my chapter since most of the time eveyrone has to go to everything, girls can get burnt out on having to constantly do sorority stuff.