You don’t need a hookup - what you do need is 2 twenties.
Walk in, say, “I am sorry but I don’t have a reservation. We are a party of 4.” Slip the Maitre d’ your twenties.
A table should appear in 30 minutes. Have a few drinks and soak up the atmo.
The earlier you get there the better. 6:30-7 at the latest tonight or there is going to be long wait. You want to sit in the front bar room. Had a great meal there last night.