How do I deal with the office b*tch?

There's always one, most of the time I couldn't give a sh*t but the whole offering everyone else tea/coffee/cake whatever and excluding me is getting tired also the not so subtle digs are annoying! I've been told she has been like this to other girls in the past and now it's just my turn before she moves onto somebody else. She gives womanhood a bad name. What would you do?