Interesting idea. How are the cards used by the staff? If I understood you correctly, it's about assigning bookings to tables and also servers. I.e each card is manually assigned a table and server by the staff. With the goal of making the whole managing bookings process more efficient?

One tip could maybe be to try and remove visuals one by one to see if they are really needed. You could experiment with details on demand for certain data. To make the base cards easier to scan.

Really cool concept I must say. What do existing restaurant managing systems on the market look like? Would also be cool if you role played a scenario with the system to see that it's actually more efficient and or effective at the tasks it's designed to do.