I found this:
Indicators of Interest (IOIs) could be verbal or non-verbal
Example non-verbal IOIs are:
* In a pub, a stranger chick locks EC with you
* In public environments (everyday places), a stranger chick locks EC with you, keeps looking, smiles
* Lots of EC from her, or solid EC
* She has "brightly" eyes looking at you, and "that" interested look
* She starts playing with her hair (looking at you interested), bite lips or lick lips
* She shows you her leg while stretching her ankle
* She touches her breast or necklace.
* She leans towards you
* She makes kino on you/reciprocates kino (also known as reverse-kino?)
* You hold her hand and she squeezes back
* In a party, she keeps on "appearing" close to you or puts herself in a place where it is obvious you can see her (this is also known as an AI, an Approach Invitation)
http://www.fastseduction.com/cgi-bin/fswiki.cgi?Indicators_Of_Interest