OK, I know NPC sorority rush/recruitment has the same basic structure everywhere, but given differences in number and size of chapters, whether they're housed, the possible existence of local sororities, etc., I'm curious as to what happens at different schools. Thought this would also give the PNM's an idea of what to expect. (I'm calling it rush - it's easier to type

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Please state: number of sorority chapters, quota and total, how many have houses, when rush is held, and how your parties are structured.
To answer my own question - My school had 5 NPC sororities, no locals. (Before my local went national, though, we did hold rush alongside the 4 nationals.) Quota was generally 30-32, total was 80. 4 of the 5 were usually at or above total at the end of formal rush.
Formal rush was held in August, before classes started, so the first thing you did as a freshman coming to campus was rush.
When I rushed, one sorority had a house; I gather 2 more have gotten houses and 1 is looking. Most rush activities are held in function rooms in the student center.
Rush goes like this:
Evening 1: Tours of all 5 sororities' rush rooms, followed by an open house.
Day 2: Another open house.
First round of voting. Generally sororities invite back anyone who has spent more than 10 minutes in their rush room.
Evening 2 and Day 3: Informal rush. Sororities with houses generally take PNM's over to their house and show them around. Sororities without houses generally take people for ice cream, coffee, walking tours of the city, etc. PNM's are allowed to spend x hours with each sorority, x determined by the number of sororities they're rushing (more sororities = fewer hours). They can visit up to 4 sororities.
Evening 3: Theme parties in the student center. PNM's can attend up to 3.
After theme parties, second round of voting - whom to invite to pref. Sororities cut *severely* at this point. Voting can go well into the wee hours!
Evening 4: Pref parties, again in the student center. PNM's can attend up to 2.
Pref is followed by a final (short) round of voting, to assemble the bid lists.
Day 5 is bid day.