Number is fine. E-mail is out of date. and facebook is a bit to fast for me.
Ask for another date!
Have to have a phone number for texting. Most people can find you on Facebook anyway but asking for it is tacky that early. And why email?
I would think by then you'd have their phone number. Email? why? I mostly use email for business. Facebook - all you need is their name.
should already have them
All of the above