Pool tables will be a must for a hotel pack. So I think at least 3 new pool tables with clutter can be a good point to start. Also a water slide.
At least two new careers: hotel manager and something related with entertainment, like magician (not be confunded by wizard) or singer, for hotel events
Gambling as a new skill, including casino items from TS3 store to make a casino room inside the hotels.
Also, three new gameplay system:
-Propane tanks: for country or off the grid hotels, propane must be a new item in their bills. Propane tanks and cylinders will help to heat the hotel and being used in water heating, stoves and ovens.
-Water heating: we know water heating (and good water pressure) is a necessary thing in all hotels to bring hot water for residents. This system will work in three different models: electric heater, propane heater and basement heater (electric). Also, new functional radiators to heat the rooms during cold days if Seasons is installed.
-Swimming pool cleaning: now swimming pool must be cleaned periodically or the hotel will receive 1 star review. Swimming pool cleaning includes a floating chlorine dispenser, a leaf skimmer for insects and leaves and a underwater filter. Also, swimming pools can have a heating bomb for outdoor swimming pools during winter.
And some NPCs like lifesaver for swimming pools