This is a meetup group dedicated to exploring the ideas discussed on Less Wrong. You don't have to have read the blog before joining the group. You just have to be interested in trying to upgrade your rationality.
Thinking and deciding are central to our daily lives. The Less Wrong community aims to gain expertise in how human brains think and decide, so that we can do so more successfully. We use the latest insights from cognitive science, social psychology, probability theory, and decision theory to improve our understanding of how the world works and what we can do to achieve our goals.
Want to know if your doctor's diagnosis is correct? It helps to understand Bayes' Theorem. Want to make a plan for achieving your goals? It helps to know the ways in which we don't know our own desires. Want to make the world a better place? It helps to know about the cognitive bias called 'scope insensitivity', and that some charities are more efficient than others.
If you want a sampling of the content on the main blog, you could read some posts on beliefs, words, cognitive biases, evidence, probability, decision theory, excuses, task avoidance, reductionism, evolution, quantum physics, ethics, politics, disease, and procrastination.