I don't, but we're rarely there at a busy time, and am usually not in a hurry. There's never been much wait for 1 person.
If you're going at a busy time, or want to get in and out pretty quickly, it's better to go ahead and make an ADR, or be prepared to eat somewhere else if you don't want to wait. I usually make some ADRs each trip, and simply cancel when we want to change our plans. At least we have a reservation, if it turns out to be busy.