They're on opentable, it appears only 4, 4:30, and 9:30 are left for 1 person on Friday. Note that you can also get a Gibson's steak next door at Hugo's Frog Bar, but the reservation times there aren't much better, 5:30 and 9.
I'd call the concierge today.
I did and she got me a 5.30 at Gibsons. Thanks for your help.