Decision making is important in information and communications technology and artificial intelligence. Here, we present photonics approaches to realize decision making using classical and quantum light. We demonstrate a single-photon-based system to solve multi-armed bandit problems by utilizing wave-particle duality for exploration. The principle is applied to chaotic lasers where the chaotically oscillating time series provides fast and scalable decision-making abilities. Furthermore, we demonstrate the usefulness of quantum interference effects in social decision-making, whereby the expected value regards maximization of social benefits and ensuring fairness among individuals. The impact of near-field optics for computing is also discussed.