Substance use treatment; Treatment for co-occurring substance use plus either serious mental health illness in adults/serious emotional disturbance in children; Outpatient; Regular outpatient treatment; Does not use medication assisted treatment for alcohol use disorder; Does not treat opioid use disorders; Private for-profit organization; State Substance use treatment agency; State mental health department; State department of health; Cash or self-payment; Comprehensive substance use assessment; Screening for substance use; Screening for mental disorders; Treatment for other addiction disorder; Substance use disorder education; Individual counseling; Family counseling; Marital/couples counseling; Smoking not permitted; Female; Male; Alcohol use disorder clients only; Vaping not permitted