The reason people hold drinks at social events isn't just habit—it's hardwired neurobiology. Gripping something physically reduces motor fidgeting by occupying the hands, which are otherwise prone to anxiety-driven micro-movements. The sip creates a built-in 3-second buffer for processing responses, effectively buying time in conversation without awkwardness. Evolutionarily, ingestion signals safety—our brains interpret eating/drinking in a space as a sign that we're not under threat. Social drinking is basically a behavioral API for managing social vigilance and turn-taking protocols in group settings.