First, you would probably want to make your inn map. Then, you add an inn building to your world/main map, and have a door type turf that will move you into the inn when you step on it, or click on it, or however you choose. Inside the inn, put in something like a bed object, that gives you a verb that allows you to rest on the bed, for a price. You could also make it so you just have to try and move on the bed, and it will ask you. You could even have an NPC mob that you talk to to ask for rooms for the night. There are many ways to go about doing it.

DarkfireWolf ...
a little hint

If your gonna ask for stuff on this forum please clarify what you want...You want to make an inn...What about it do you want...do you want to make it on the map and what kind of sample code...entry, sleeping, or what...If you were specific on what you wanted you would get results more quickly...until you clarify what kind of sample code you need theres nothing anyone can do for you