Making new friends as a couple?

I was hoping that someone would have a few suggestions (or tell me their own experiences) of making new friends as an adult couple.

My husband of five years and I (both 30+) have been hanging out with the same friends within our own cultural circle.

While we enjoy the time spent with them, we feel like we’re reliant on the same four or five people.

These friends tend to have wider social networks than we do and we feel like we’re an option for them while they are necessities for us. (Does that sound horribly desperate?).

We both work full time 9hr+ jobs and spend a lot of our free time with each other (dinners, travelling, lounging at home). We have no children but are currently TTC.

Any advice would be appreciated!