So since I just finished the "dance with 100 unique people" achievement in Zumba I thought I would quickly jot down my notes for anyone else interested in self-boosting this.

Step 1 - Create 100 (or however many you require) dummy email accounts. I have my own domain, so for me this took 15 minutes, your time my vary if you are using a free provider such as yahoo or gmail.

Step 2 - Create 100 profiles on the 360 you are going to use as your boosting partner, if using another one you will have to sign them in again. Take note that each hard drive will only hold 32 profiles and each USB only 8 profiles. This step took about 5 hours for me.

Step 3 - Wait for a free gold weekend in your region. These seem to occur every few months.

Step 4 - Have your two copies of the game and kinect setups ready to go. Do single routines with the song Don't Stop (thanks to Planting for this advice). You can host 10 with your boost tags then do the rest hosting yourself. I did private invite sessions.

Other Notes - I had the game installed to hard drive for all 4 hard drives. You don't have to go to dashboard between switching profiles. It was quickest for me to finish a song, go to main menu, hit guide, hit X to sign out, X to sign in and pick the next profile, B to go back to game. Then hit start and register your tag in game again, I did make saves but I'm not sure that step is necessary.

If someone is helping you can do about 12 a hour depending if there are no hiccups which of course there will be. Sometimes I would have the tag not register at the end, connection issues, general kinect issues... all in all the 100 plays was about 9-10 hours.

Thanks to Ryot for the great guide on x360a.