The easier method (which is also available to all protagonists, not just Franklin) is to call 611-555-0126. There is no requirement to call her other than the fact that GTA 5 players will need to enter that number manually.
- Go to a strip club and request a stripper for a private dance there. - Flirt with her to raise your Like metre. - The stripper will request that you meet outside once the Like metre is full. - Select Go home, then meet her outside the nightclub.