At trade shows, expos, conferences and alike, exhibitors use Proche to raise awareness of their products & services more effectively and/or attract more event attendees to their booths.
At temporary markets (e.g. Festivals, Fairs, Holiday Markets, Farmer's Markets, Flea Markets, pop-up markets) vendors use Proche to promote their products to nearby potential buyers. Local businesses attract nearby customers the same way.
At in-person professional social events, they use Proche to quickly pinpoint the likely job prospects, collaborators, clients, customers.
Organizers of meetups and other off-line gatherings use Proche to make annoucements (especially those contain information difficult to describe verbally, e.g. links, pictures and videos) without interupting activities of attendees and without making signage.
Social distancing is highly desirable at COVID-19 testing sites. Personnel at such sites use Proche geo-fenced chat rooms to locally broadcast testing-related information and folks being tested use these chat rooms to ask questions.