One of the first things I did when I took responsibility for our laboratory is bring in a giant lab bookings board. This one is designed so you can easily rotate the weeks around without having to transfer all the bookings. Have it gloss encapsulated so you can use dry wipe markers on it! Feel free to re-use it under the CC licence below.
Lab Bookings Board v.1 by Tom Bishop is licensed under a Creative Commons Attribution 4.0 International License.