A 1 or 2
Not only can see who coming in front or out of kitchen, you can also scan to make sure the interloper has no allies in the restaurant or any potential problems from other diners and your back is against the wall..
C2 or F2, then B2.
999 times out of 1000 from these seats you can watch the pretty hostess work and get to the Restroom quickly.
If you have a CCWP you can shoot from cover of the inside corner. If not, throw chairs and plate at the guy and give the guy in the next table time to draw his 9 mm and shoot him.
I’d take I-3, back to the door and closest.
The bad guys would never suspect I am an Operator.
G, B or C. The kitchen should have a back door.