The proper attire for a frat party is dependent on the theme. If more than one party is being attended, find an outfit that can go with either theme.
Most frat parties have a theme for the guests, such as the 1980s or highlighter parties. Try to dress to fit the theme without going overboard. Also, take the weather into consideration. An outfit can be cute and still keep the party goer warm. Try to wear comfortable shoes if there will be walking involved to get there. Never go to an unknown frat party alone. It is always safer to go to parties with a group of friends.