finalizing dj

I am finalizing a song list with my dj tomorrow... have an appt tom night at 9.. Ladies, I wanted to know... how long does it generally take? I mean fh and I made a must play list, bride and groom entrance, etc... but I mean, if he suggests things, etc.... how long does that take? because my dj is all the way out in LI and I live in Brooklyn and I dont wanna be there for more than 2 hrs LOL.. thanks ladiesssssssssssssssssssss<3