 The main union building is mostly underground; its top bar is known as burst bar serving smoothies, juices and teas adjacent to this is the 'Zig-Zag' bar .at the top of the SU is the lounge selling Costa coffee and sandwiches; below this is 'Illusion' which has a dance floor and pool tables, and is sometimes used for private events.Down from 'Illusion' is the main bar, known as 'Sub