What is the name for an interest group that was established for other than promoting political positions has a regular standing in society and engages in political activity very selectively?

An interest group established for purposes other than promoting political positions, yet engages in selective political activity, is often referred to as a "non-political interest group" or a "special interest group." These organizations typically focus on specific issues, such as environmental concerns or professional interests, but may occasionally engage in political advocacy to influence legislation or policy relevant to their area of focus. Their primary aim is usually not political, but they recognize the importance of political engagement in achieving their goals.