Events +, social intergrated login vs. WP registration

Hi there,
I have finally gotten everything working and am worried about messing with it. However, I would like to let clients log in with their FB & twitter accounts for ease. Can you please tell me if this would interfere with anything I have (the membership plug in has caused issues and has been disabled) and how I would track clients registered in classes and if would have any impact on my gathering emails for the newsletters I will be sending out via your plug in?
Thank you, would rather sort out any issues now :slight_smile: