I have started the Tel Aviv Self-Improvement Meetup Group. It is not about rationality or LessWrong per se, but it is heavily influenced by rationality dojos and LW posts in the applied rationality, personal optimization and anti-akrasia cluster. As the description says, it is
A group of people helping each other apply rationality to our everyday lives, in order to improve our skills, make the best decisions, become productive and achieve our goals.
If you're interested and in the area, you're welcome to join. If you have any comments or suggestions, based perhaps on experience with similar groups, please share.