From Route 37, it is the building on the immediate right of the second "street", directly behind the Pokemon Centre, the Dance Theatre is there.
ecruteak city
they are in Ecruteak City, in the house behind the Pokemon center
When you get to Ecruteak City, go to the house where the Kimono girls are. Beat all of them, and after that, speak to the man with the Rhydon. He is in the same room as the Kimono girls. He will give you surf.
In ecruteak city to find them find a house saying ecruteak dance theater then go inside and talk to the man in the hat then battle the kimono girls when have defeated all of them talk to the man again and he will give you HM03 surf
Ecruteak City Its Looks Like A Temple Thing And Next To The PokeMart
Go to Ecruteak City. Go to the house to the right of the city where the Kimono Girls are. Beat all of them and then speak to the man with the Rhydon in that same room. He will give you surf.
They are in a house in Ecruteak City (not sure which one as I am trying to remember off the top of my head). It will have a sign next to it, so you know it's an important house. Go into the building (the dance studio) and there will be a stage with 5 girls in kimonos on it. These are the 5 Kimono girls.
Dance theatre in ecrueakcity heartgold
In the Pokemon center in ecruteak city When you enter the ecruteak city Pokemon center bill will come down from upstairs then he will return to his house in goldenrod city
In ecruteak city. beat the gym leader to be able to use surf outside of battle. then go to the house of the five kimono girls each with a different evolution of evee
In Ecruteak city in the house right of the Pokemon gym
in ecruteak city on the left house next to the Pokemon center