If your services are no different between locations, I would suggest having a single page for each service rather than a page for each service in each location. To compensate for that, make sure you have pages dedicated to each location (as I'm sure you do, based on what you say). You could also write about what makes the location's services special.
- Who works there and what do they do that's unique to that location?
- How do you service that location?
- How does bringing your services to that location benefit it, specifically?
- etc. (you get the idea)
It can be taxing to write original content, do research, and such - but there's no magic bullet for content. I'm not sure how your business is structured, but as an aside, having the specialists themselves write articles about what they're doing would likely lead to very rich, organic content. Probably not plausible, but something I'd recommend nonetheless.