Smoking weed while playing poker affects people differently, so whether it's good or bad for concentration depends on the individual. For some, cannabis may help reduce anxiety, improve focus, and create a calm mindset, which can be useful in stressful situations. However, for many others, it can impair short-term memory, slow reaction time, reduce critical thinking, and lead to poor decision-making — all of which are major disadvantages at the poker table. Overall, while some players believe it helps them get into a "zone," the risks to clarity and discipline usually outweigh the benefits for consistent, high-level play.