My dog Kimba likes to play rough with every dog it sees. How can I train it to leave a dog alone who doesn’t want to play?

I have been reading your Q&A section, and have found several articles very useful for our problem, specifically the one about the dog that wouldn't come when called.

Our problem is this: We take our Kimba, a neutered, 1 yr old male Rhodesian Ridgeback, everyday to an off-leash park to run/walk/play (I know that you are not an advocate of dog parks, but please hear me out). We often walk with friends who also have two RR's - Rio, a female litter mate of Kimba's, and Rocco, a 4 yr old neutered male RR. The dogs love to play, especially Kimba and Rio - Rocco is more aloof and likes to take it easy. As is with RR's, they love to play rough, and Rio and Kimba are no different. That is not the problem. Kimba is very dog and people friendly with the exception that he thinks that every dog we meet should want to play, and play rough. By rough I don't mean biting or nasty play, just lots of paws and "arms," rough and tumble, big dog play. In most cases this is ok - but he seems to lose his sense of hearing when he is playing - often not coming let alone leaving the dog alone. I end up going up and often getting him back, putting him on the leash etc. While I recognize that he is "tuning me out," and that we need to work on our "coming" (and your article gave some good ideas for doing that), is there another command i.e. "leave it" that I can teach him in order to get him to leave the dog alone? I don't necessarily need him to come to me every time we experience this, but I want him to leave the other dog alone if it becomes obvious that the dog and/or owner don't want to play, or if we just want to walk further along.

I would appreciate your advice.

Thank you.
Carol and Kimba