In general, Sheratons are the most likely to have a lounge, though it is not guaranteed. While there are some Westons and Le Meridians with a lounge, there aren't very many of those and all new Westons seem to be without a lounge. Most other Starwood hotels don't have any. Basically, if you are looking for free breakfast, that seems to be Hilton's focus. Even without a lounge free breakfasts are still offered.