As far as i am aware you can have a hotel using open for business, but you will need the bon voyage expansion too as there are parts from it that are required.
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the sims,the sims 2,the sims bustin out,the sims2 castaway,the sims2 pets,the sims 2 nightlife,the sims 2 open for business[there may be more]
You have to start your own business
There is only one disk.
If your trying to download Sims 2 Open for Business, the password (you must have bought the DVD.) is on the back of the manual. I can't tell you the password, because all of the passwords are different. I hope this helped!
sims is just one package but sim double deluxe comes with night life and open for business and sims 2 =)