Is it safe to eat 4 day old cooked chicken that has been refrigerated after setting out for a few hours at a wedding?

It is generally not safe to eat cooked chicken that has been left out at room temperature for a few hours, as harmful bacteria can multiply quickly in that time. Even if the chicken was refrigerated afterward, the initial period at room temperature may have allowed bacteria to grow, which could pose a risk of foodborne illness. It's best to err on the side of caution and avoid consuming it.