Drugs aren't a big part of this site; there may be a few members who recommend some chemical stimulants, but it's far from being a consensus. If you asked me to list important and useful ideas and advice from LessWrong, I don't think I would list "use drugs" except maybe in 100th position or so.

As for quitting religion, I recall seeing anybody actually recommend that people drop out of religious groups (though there may be some - any links?); it's just that some people have done so as a result of just not believing in religion any more.