I have not previously seen this and have not finished reading it but it contains a lot of good research that should be helpful. And as you might infer from the fact that I am saying positive things about it, it does not take the position that Epicureans should be hermits!
File
Epicurean Mission and Membership From The Early Garden To The Late Roman Republic
A very good article covering the "missionary" aspect of the Epicurean movement.
Cassius