I like the selection of ages and styles. As to the first 2 hours, I wouldn’t stress it too much. This is a graduation party not a club. The attendees are not accustomed to mixing at the Club level. This is the meet and greet time where people want background sound and drinks. Also ask your friend what he wants, he is the client. I would make up your mind if you are taking requests or not and hold firm. I used to put up signs $1000 to play Justin B. Mixing 90/00 of the styles you are using isn’t the easiest. If you are good with the EQ knobs you can help it a bit by cutting the lows as you come in and go out. Check the fidelity of the older tracks too. When CDs first came out you had AAD, ADD, DDD. A is Analog and D digital. All 3 mixing and mastering styles sound different. If you use Key Progression and watch your BPMs, those quick cuts won’t seem as bad. You should have fun, people like to see the DJ getting into it. If you are bumping along to your tunes then people will feel your energy.
