Co-host a dinner with one other person and each invite your own guests, so half the room is new to each host.
Hosting runs into two walls. It's intimidating (no matter how many times I do it, I still have social anxiety), and you only know so many people. A second-degree dinner fixes both. Pair up with one other person and each of you curates your own half of the invite list. The anxiety is shared between two hosts, and because you're pulling from two networks, half or more of the guests are new to each of you. It's also a quiet way to make your network more diverse, since your co-host's people don't look like a copy of yours. This is now my default event. The name comes from Nat Eliason's post; I'd been doing it for a couple of years before someone sent it to me.
Back in The Before Times I used to invite five or six people to breakfast at my favorite coffee shop on Friday mornings. Then two young kids ended any chance of me getting downtown by 8 AM. So it became dinner. Guests have a great time and ask to be invited back, and I still have the nerves and the same limited list of people, which is where co-hosting came in.