The Innkeepers lounge is on the 4th floor...There are other rooms (non club level) on the 4th floor so you don't need your room key to exit the elevator, but you walk down the hall a bit and there will be a door to the club level area that you need your key to access. After you pass through that door (maybe pass by 6 or 7 rooms?) the Innkeepers lounge is on your right hand side. Then the hall continues on with more rooms.
Club level rooms are on both sides of the hall, so some will have a boardwalk view and others a garden view. The ones on the same side of the hall as the lounge will have the garden view. Many of the garden view rooms will have a view/partial view of the Epcot illumnations fireworks.
I've heard that some of the club level rooms are on the 3rd floor, but I don't have any personal experience with this.
What type of room did you want to book (standard, deluxe, a suite?)?