Well, I had this idea.. You know all those lots that come with new EPs? Such as the Consignment Store and Salon, etc. with Ambitions and the Bars and Clubs with Late Night? And I'm sure those of you that have the EPs remember the hassle that it was of choosing where to place the lots in towns that don't already have them? Well, my idea was that we could devise a list of the best places to place these buildings and new lots to place the buildings on, in each town. I'm hoping that with a bit of help, we can have a list ready with maps of the newly-furnished towns and tutorials for especially tricky things. (E.g: Placing the Film Studio in Sunset Valley) This'll take a while though, but I'm sure we can do it!
So, post your ideas! Where in town did you place your bars/clubs, etc? What works best for you?
Ironically, I myself don't have the game available right now because my simming laptop needs a new fan, but when I get a new fan I shall fire up the game and provide the addresses of where I put my lots.

Please try and keep the 'bulldozing lots and replacing them with these new ones' method that most people use to a minimum, because the idea is that the town itself should be kept, but with these new lots added. Of course, lots like the film studio will probably need to be placed where an old lot was, so there are some exceptions.
I'm hoping that sometime soon we can have a growing list of helpful information that will help us all with what is probably one of the most annoying parts of getting a new EP, ever - placing these lots!
Sunset ValleyConsignment Store (Ambitions): 9 Sun Song Ave (20x30) - Next to the Frio's Household
Fire Station (Ambitions): 74 Landgraab Ave (30x40) or 99 Landgraab Ave (30x30) - Both near the Jolina Household.
Salon (Ambitions): Can be either 299 Skyborough Boulevard (40x40) or 415 Skyborough Boulevard (40x40) as they are both the same lot size. - Near Christopher Steel's house.
Movie/Film Studio (Late Night): On a new lot at Pinnochle Point, or the Film Studio can replace the Science Centre and the Science Centre will be placed at Pinnochle Point - Your choice!
(Extra note: Take care with placing any buildings at Pinnochle Point if you'd like to fit all the bars and clubs there as well, as it can be quite tricky to fit them all)
Equestrian Centre (Pets): Can be either 299 Skyborough Boulevard (40x40) or 415 Skyborough Boulevard (40x40) as they are both the same lot size. - Near the Hart and Steel households.
Horse Training Centre (Pets): 20 Summer Hill Court (60x60) - Where the Alto mansion stands, just evict the Altos to another house, bulldoze the current lot and replace it with a new lot for the training centre!