OPI. OPI, standing for either "Our Private Interhouse" or "(Our) Own Private Interhouse," traditionally occurs during the winter term of the academic year. One of the most notable aspects of the OPI is the amount of time and effort put into construction and artwork for the sets of the party. The past decade's preparations have included a Mayan temple, Roman Colosseum, skylines of Tokyo, a giant Egyptian pyramid, a 16-foot-tall windmill and 20-foot-tall elephant statue from Moulin Rouge, the Hanging Gardens of Babylon, and a Gothic cathedral with 32-foot-tall facades. Avery House Avery House is part of the housing system at the California Institute of Technology, participating in Rotation and housing undergraduates, yearlong exchange students, faculty, and visiting guests. Avery's members are called "Averites." Founded in 1991, Avery had previously only housed upperclass students, graduate students, and faculty, but by a 10-to-1 vote in May 2004, the Faculty Board approved the decision to make Avery open to incoming freshmen on a two-year experimental basis. Since the 2005–2006 school year, Avery has been part of the Rotation process and houses incoming freshman. Some recent traditions include Team Gotcha (Assassins using water guns), an Iron Chef competition, and a Faculty Dessert Night with an open talent show. Avery House most definitely participates in interhouse sports, holds an annual interhouse party, and organizes annual ski trips, beach trips, and BBQs. In line with its historical position as an alternative option to the house system, Avery embraces an accepting mindset whereby anyone who wants to become an Avery member only needs to attain ten signatures from Avery members who are living in the house or have lived there previously. Avery enjoys an environment of faculty families. The Faculty in Residence (FiRs) are chosen by the students in an interview and discussion process and the faculty are provided budget to hold social events for the undergraduates of the house. Events held by faculty include Super Bowl parties and casual dinners. In both physical size and bedspaces, Avery House is noticeably larger than the other houses, housing almost twice as many undergraduates as other houses. Avery House has several facilities, including a dining hall with a large kitchen, a conference room, a piano room (Gary Lorden Recreation Room), a library, a garden, and a basement garage. The dining hall, library, and conference room are available to the Caltech community for official events after approval by the