if you havent started the chain yet, try going to the Beauty Centre on Monday around 10:00 then start waiting. I did not have to pop in and out of the building like i did with Jenny. Mon and Wed you will find Maria, she is the start. Second you talk to Lucia on Tues or Thursday. Maria one more time, then you need to find Lucia in the sauna, go a couple hours before close and wait till you see her. might take a few days. when you find her she will lead you to the jacuzzi, then the Beauty Centre is unlocked.
Put male agency models on contract. its not expensive to break their existing contracts, usually less then $20k
Tried every day. I think I passed about 3 months ingame by just waiting. Bummer was a fun game but its nowhere near a stable playable state.