Defined parties as groups who were concerned with exercising power or influencing decision-making.Broader than conventional political parties, might include groups such as trade unions or pressure groups, eg. Greenpeace.Some parties are linked to class interests, eg. many trade unions represent groups within the working class.However, pressure groups often draw their members from all social classes.Some parties may also represent specific status groups, eg. Stonewall campaigns for the rights of LGBTQ people.