Today I'm going to be helping you get the achievement Enjoy Your Stay for 20G. To complete this achievement you need to participate in everything Los Sanstos has to offer
Below are the thing you need to do in order to complete this achievement

• Getting a Tattoo - Best to get a chest tattoo
  
• Get a hair cut
  
• Buy some clothes
  
• Play Golf - Can be one hole and you don't need to win
  
• Play Tennis - Can be one set and you don't need to win
  
• Play Darts - Can be one set and you don't need to win
  
• Complete one challenge at the shooting range
  
• Hold up a store
  
• Arm wrestle
  
• Buy a private dance at the Strip Club

These can be boosted with a friend. If someone leaves during Golf/Tennis/Darts/Arm Wrestling then the achievement might not activate.

If you forget what you have done you can check it out by press Start>Stats>Unlocks>Progress
Some of the Unlocks might say Yes, to be safe just do them again.

Hope this helps! Feel free to PM me and I will help out as much as possible.