Informal:
* Tu veux qu'on se rencontre ? (literally: "Do you want that we meet?")
* Tu veux te retrouver ? (literally: "Do you want to find each other?")
* On se voit ? (literally: "We see each other?")
Formal:
* Voulez-vous me rencontrer ? (literally: "Do you want to meet me?")
* Souhaitez-vous me rencontrer ? (literally: "Do you wish to meet me?")
* Aimeriez-vous me rencontrer ? (literally: "Would you like to meet me?")
More specific:
* Tu veux qu'on se retrouve pour un café ? (Do you want to meet for coffee?)
* Tu veux qu'on se retrouve au cinéma ? (Do you want to meet at the cinema?)
The best way to choose the right phrase depends on your relationship with the person you're speaking to and the situation.