Traditionally, boys dress in black or white formal wear, regardless of the time of the event, sometimes paired with ties or bow ties with vests, in some cases in colors matching their date's dress. Traditionally, girls wear dresses or evening gowns and adorn themselves with ladies' jewelry such as earrings and a necklace. Traditionally, girls wear perfume, and make-up such as eyeshadow, lipstick, mascara, and blush. Girls also traditionally wear a corsage, given to them by their dates, and girls give boys matching boutonnières to be worn on their lapels. Prom attendees may be limited by their schools to be juniors or seniors and guests under age 21. Before prom, girls typically get their hair styled, often in groups as a social activity at a salon. Prom couples then gather at a park, garden, or their own and their dates’ houses for single and/or group photographs. Prom attendees may rent limousines or party buses to transport groups of friends from their homes to the prom venue: a banquet hall or school gymnasium. Some schools host their proms at hotel ballrooms or other venues where weddings typically take place. The dance itself may have a band or DJ. At prom, a meal may be served. The cost of prom in the United States averaged $1078 per family in 2012 and $1139 in 2013. Some high schools allow only the graduating class ("seniors") to have a prom. Some schools also allow grade 11 ("juniors") to have a prom, and select high schools even have proms for freshmen and sophomores. In some cases, there is a combined junior/senior prom. Some American high schools and colleges that do not allow school-sponsored dances will host a junior/senior prom as a banquet instead of a dance. Typically, students still dress in formal attire and attend as couples. More and more colleges are hosting proms in recent years, usually as fundraisers for campus organizations such as ballroom dance groups, fraternities/sororities, or other organizations. In recent years, American teens have started asking celebrities or famous models to their proms. After the prom, parents or a community may host a "prom after-party", "afterglow" or "post-prom" at a restaurant, entertainment venue, or a student's home. Other traditions often include trips to nearby attractions, such as amusement parks, regional or local parks, or family or rented vacation houses.