Not realli. not everyone appreciate smiles, some may tout u are
pervert...(no offence)
i think one very good way
is to find a chance get to sit beside her, den suddenly ask her for
the time, becoz in this way,she will not find it akward or funny.
den tell her softly(so tt other ppl will not heard u),"xiao jie, i
find u very attractive. can i get to know your name?"
see in this situation she tell u her name, ur chance is half to
success.
so if successful, carry on asking her, "can give mi ur hp number
for future contact?"
good luck.=)