Centers of activity are places where people come together to work, socialize, or engage in activities. HOTBEDS (7 letters) are areas that are particularly active and bustling with activity. FOCI (4 letters) are points of concentration, where people come together to focus on a particular task or activity. HUBS (4 letters) are places that serve as a central point for activity, often connecting different areas or activities. LOCI (4 letters) are locations where people gather to engage in activities. HIVES (5 letters) are places that are full of activity, often bustling with people.