Continuity mistake: As mentioned in a previous error, just before Jake is checked into the Surf Hotel, there is a long scrolling shot that illustrates the surroundings of Jake's room in the hotel. In particular, notice that Nathan's Seafood and Clam Bar is not across the street from Kennedy Fried Chicken. This is contradicted later when a) Jake looks out of his window and sees the Nathan's sign, and b) Jake is seen leaning out of his window above the Kennedy sign.
Continuity mistake: When the two officers escort Jake into his hotel room, you can see that there is a wall to the right of the three men as they walk into the room. In other words, Jake's room is at the end of a hallway. However, when the officers leave Jake's room, you can hear the door shut, and the wall is no longer there. In other words, Jake's room is no longer at the end of a hallway.