That means she dont have what you are looking for. Bet shes not the only one who drinks coffee. Cut the reaction time and talk staright away once you find interesting girl. You waited next day and its the same as give her a yesterday baked bread when its at it best straight from oven.
Also just this week I found out that girls hate too direct aproach. For example you go to a girl in nightvlub and say:" Hey sexy ! Do you wana drink something?" Thats disqusting. Cause you label her already and she have to live up with that label. And basicaly she might feel just like and object. Much better is to show direct human interest instead :" Hey girl, Whats your name? How are you? Where are you from? (Thats how girls been aproaching me and now I understand its much more sensitive than what we guys are doing.)
I dont know how you asked that girl out for coffee(althought I would like to know it). But if you asked straight away :" I see you reading book XXXX would you like to discuss it over coffee?" Now thats acting like you already know girl cause 1) You assumed shes so passionate about book that she would like to talk about it and also theres assumtion that she likes coffee. Instead would be better to talk with girl for few minutes get to know her a bit, at least her name and relationship status and only then ask her out. Also you can get her invest emotionaly straight away. Instead "do you want" better question is " if you want". Like putting her on the line. Making it even more clear that it depends on her. Even more - letting her innitate the date. "If you want we can go but if not its ok with me too" Now she really feels thats its all about her decision cause you not desperate and will be cool without her aswell.