How do I make her ask ME to dance?

First off, you can't MAKE her do it anymore than she can MAKE you do it.
Second, don't base what you think you should do on what you think (or are told) girls want. Think about this, do you want to be the kind of guy who has the confidence to ask a girl out or do you want to be the kind that sits and waits for her to make a move and possibly miss out on the whole thing. The fact that she said yes the first time "shows" she likes you so I don't think you really have anything to worry about. :-)

Yes..it will so here is what you should do take a drink over to her in say that I was look at you in you look like you could use something to drink so I took the liberty to bring you one in then walk away in I bet she will come in ask you to dance....

Walk straight up to her, look her in the eyes, and ask her. As soon as you get there, before someone else does it!
You won't come off as desperate, I promise! You will come off as confident, and that is always attractive!
She will be flattered if you ask her to dance with you again. You'll make her feel irresistible, and beautiful, and every girl wants/needs that!
And even if I'm wrong (trust me, I'm not) and she doesn't dance with you (trust me, she will) then at least you'll know for sure how she feels.
No matter what, asking her to dance will make her feel good, and will give you a little bit more confidence to hopefully not be so shy when it comes to the next girl. Or the next.

Just man up and ask her. Some girls have been brought up to believe that guys should do the asking (myself included). I don't totally go by that anymore, but it's a hard notion to overcome, and I still feel that a guy "should" approach me first. You will not seem desperate; however, you probably should have asked her sooner. One day is a really short notice for a girl to get ready for a dance. But it's not too late to ask.

Well try to give her some hints to ask you to dance
like that songs is great
i liked your way of dancing last time I don't know if you still got it
anything I don't know

Ok I would never never never ask a guy out, or to a dance. I am very old fashioned and to me it is the guy's job. So she might be like me and not ask you and if you want to go with her you should probably just go on and ask her. That way you can guarantee you will go with her, and in my opinion if a girl has to ask a guy the guy is weak. And it shows that the guy doesn't like me that much. That's just me but I am sure there are a lot of girls like me too. So go ahead and ask her, be a man.

Alright man here is the deal with that. Women don't want to be asked to do things they hate it just like if you want to go to dinner or something and you always say hey where do you want to go. There response I don't know you pick , then you say no no you pick and yada yada, until she gets mad and says ok fine lets go here so you go there because you relied on her. This makes you look bad, it goes the same for dancing, if she is looking at you like hey come over here and talk to me or dance then go over there and say hey lets dance, or just take her by the hand and lead her to the dance floor, you need to be a leader with her not a follower, trust me on this, the guy is supposed to make the decisions so all you have to is keep that in mind and you'll be ok, that's prob why she hasn't asked you to dance, she wants you to ask her.

If she danced with you the first time,theres a good chance she will the second time. Also, its better for you to ask her,it won't make you seem desperate. It will make you look confident. If you wait and she doesn't ask you then you won't be able to go with her and she might dance with another person. By doing nothing, you gain nothing. Don't wait for her, do what you need to do

Don't be a pussy. Go and ask her out, girls are VERY nervous when it comes to asking out a guy, like 10x more nervous than guys are. Chances are she won't ask you out and think you don't like her because you did not ask her. You don't look desperate by asking her out, ooze confidence when you ask her and she will be all yours.