Loneliness is an epidemic that the U.S. Surgeon General implored must be addressed by society as a whole. Increased loneliness (i.e., distressing feelings of isolation) in people with Parkinson's disease (PD) has a pervasive impact and is associated with worsened motor and non-motor symptoms, and quality of life. The investigators expect that individuals participating socially in the community would experience less loneliness. However, for individuals with PD participating in community-based group exercise programs, the investigators have found that over one third still report being lonely. Therefore, an evidence-based program needs to be added to address a significant problem of loneliness for people with PD-and occupational therapy is the leading discipline to add the intervention because social participation is one of eight occupations that an occupational therapist is focused on optimizing. The chief executive officer at the Parkinson Association of the Rockies (PAR), members of the Colorado State University Occupational Therapy Department, and members of the University of Colorado's Parkinson's Exercise Research Consortium have teamed up to address pervasive loneliness. Social prescription is a prime evidence-based intervention to add to existing PD community-based exercise classes because it has been shown to reduce loneliness. For this project, the investigators detect participants in the 'lonely' range through a standardized assessment. The investigators will work with PAR staff who will refer individuals identifying as 'lonely' to an occupational therapist, who will complete an individualized occupational profile and write the appropriate social prescription from 11 different interventions (examples include: intergenerational intervention, animal companions, physical activity, occupational therapy) from established community resources recommended for social prescription. The proposed project is designed with three primary goals: (1) determine the reach of the social prescription program, (2) evaluate the effectiveness of the program at one site, and (3) determine implementation strategies for scalability.