Excellent post Jaz!
When you're in that situation and can't use material, then you just have to use your techniques and bin the material.
Situational stuff is always useable.
A bit of alcohol can save your arse bit *not too much!*, easier said than done tho haha

I find that negging and showing that you're not hitting on them, but you are an interesting, fun guy helps a lot with the old confidence.