People Experiencing Homelessness and Integrative Medical Care: Implementing Music Therapy, Art Therapy and Mindfulness Meditation Sessions in a Low-Threshold Day-in Center in Lausanne for Greater Health Equity

The goal of this study is to evaluate the feasibility and acceptability of implementing group sessions of music therapy, art therapy and mindfulness meditation in real-life setting in a specific context (in a low threshold day-center for people experiencing homelessness in Lausanne \"L\'Espace\"). The second aims consists of exploring participants\' experience of these implemented approaches and describe participants\' trajectories in terms of health-related QoL, psychological distress, perception of pain, self-esteem and relation to others over time. The sessions will be implemented sequentially in three blocks: * Music therapy: 8 biweekly 2 hours sessions over 4 months (group of 8-12 participants); * Art therapy: 8 biweekly 2 hours sessions over 4 months (group of 8 12 participants); * Mindfulness meditation: two consecutive 8-week program (weekly 2 hours sessions, group of 8-12 participants).