Walking around planetarium

Hi, would be anyone interested in walking/meeting around planetarium? Jago is 9 years old male, he gets on particularly well with female dogs or smaller than him. He is good off lead, I try to not make him run as crazy because he has some health issues. Sadly he is reactive with German shepherd/, Akita since he had a bad experience in the past :( Also he gets grumpy and stressed with young energetic dogs, sorry :( I am happy to have some quiet walks on lead and/or some playtime off lead. If you have a bigger male dog I am also interested in trying, when he knows the dog he gets fine (he used to go a lot to dog sitter with all kind of dogs).