There's the chat box in the bottom right (a little square-smiley-face-speech-bubble in a circle). Maybe that's what you are looking for?
You can also ping me at habryka@lesswrong.com. You can also send any admin a PM on the site by going to our profile and clicking the message button.
Is there a way to privately contact LW? Like an email or something similar?
I feel a bit dumb asking this but I gave a look around and found nothing, and am in need of such a tool.
Thanks