I'm having difficulty entering Maug's Hotel... I think this must be a bug because I was in there before, when I mistook that building for the warehouse with the ale.... My half-ogre just can't enter, he acts as though the door's locked, but it's not. My game has the 1074 patch. I don't know what's wrong.
You might try reloading last save if it was before you tried opening the door, if not, you can command your party to attack the door using the F2 key (take swords off them tho, it damages them). If all else fails do as the right honourable "Just A Geek" says and look around for another way in, there is one.