I need the owners contact details of all the boutique fitness studios in London

General information for the business: We aggregate the dispirate independent fitness studios in London
Industry: Sports and Fitness
Geographical areas: London, UK
Data to include: We have an excel database with the details of approximately 250 independent fitness studios in London. However, in many cases we don't have the owner/ managers direct email address, we only have a generic contact address. We need the decision makers address so we can contact them with our proposition. Sometimes this information may be available on their website, however often times it may require other means of research e.g. phoning the studios, researching linked in etc to find out the correct email address. We do not want generic addresses such as hello@/ contact@ etc, we want the email address of the decision maker (owner or manager).
Extra notes: If you find a new studio that's not on our list while researching the above then please also add this to the list.