An achievement or milestone system that pushes players to the features would be great for the tutorials, pointing them to necessary systems.
"Checking Out The Girls" - Open the stats menu for one of your girls.
"Better Than Bare" - Upgrade a room once.
"Fancy As It Gets" - Fully upgrade a room.
"Striptease And Service" - Earn enough XP for a girl to upgrade her services on offer.
"Beautiful And More Beautiful Still" - Upgrade a girl's Beauty stat to X.
"Variety Is The Spice Of Sex Life" - Buy a new outfit for a girl.
"Every Hole Is A Goal" - Upgrade all of a girl's sexual skills.
"House Of Carnal Pleasures" - Upgrade both the bar and the strip club.