One way to target potential recruits of specific demographic or ethnic groups could be specific transit advertising placed at particular bus or subway stops.

Demographic Groups

Categories of people characterized by particular criteria such as age, gender, income, ethnicity, or education level, often used in analysis and marketing.

Ethnic Groups

Communities or populations sharing common cultural traits, ancestry, language, history, society, culture, or nation.

Transit Advertising

Marketing and promotional activities done on public transportation and its related infrastructure to capture commuter attention.