Non-scaling service?

I have a bit of a strange use-case, but I’m interested in deploying a set of non-scaling services (because of reasons!) alongside a set of normal, horizontally-scaled services. I think I can achieve the equivalent by making a service scale from a range of 1-1, but I think this would incur the overhead of putting a load-balancer in front of each non-scaling service. Is there a feature that allows this, or is this not something to worry about?

Thanks.