“… or if you eat at non-certified vegetarian or non-meat restaurants”
And your fragmented thought is implying what exactly? I’m kidding, I’m well aware of what you’re implying. You’re trying to use the far left of observance of MO to be the rule for the whole. And it’s a feeble attempt, and it’s not relevant to the conversation, because the super majority of the Jewish population in those towns are NOT far left in observance. In fact there has been and continues to be a steady march to the right for many years now. So, back to actual topic at hand (and brushing aside the prob mechilah you have to ask of thousands of fully frum jews) the communities I have listed would fit very well with what the OP indicated was his desired neighborhood.