There's a garage about a block or two to the north/ west of the cafe that advertises $24 for day's parking.If you are planning to attend plan on public transportation or Lyft. Parking is ridiculous as I learned when I visited it on a regular day that was even kind of slow.
When I was there I parked in their parking "structure". The cars all blocked eack other in. When you went inside you had to tell the desk where your car was located in there so that if someone was leaving and you had them blocked in they pages you and you had to go outside to maneuver your car to let them get out. I'd not go back in ant way other than Lyft/Uber.The pool hall has some kind of arrangement with a nearer place but it looks pretty small. You could try your luck parking by Uncle Bill's Diner -- I don't know how carefully they police the lot. I've parked on the street before but it has been a challenge.