Aston Students' Union (SU) used to be called Aston "Guild" of Students. It is a non-profit independent charity. It was set up to represent and support its members. Most members are current students at Aston University. The SU operates a number of commercial and non-commercial services. These include; the Advice & Representation Centre (ARC), the Aston Athletic Union, the Aston Societies Federation, the SU Shop, Copyshop and B4 Bar. The Aston Athletic Union supports the university sports clubs. The Aston Societies Federation supports non-sporting societies.