Sportpaleis, Lotto Arena and Forest National:
In these larger venues, one 'physical' block is usually considered to be two 'numerical blocks'. For example: Sportpaleis block 118/119: in the middle you will find two seats with the same seat number 8. Not all blocks contain the same number of seats, so other combinations than 8-8 are also possible.
1 'physical block', 2 'numeric' blocks:
Trixxo Arena and Trixxo Theater Hasselt:
In these venues, the numbering per block is normal: 1 -2 - 3 - 4 - 5 - ... and each block is separated from the next by an aisle.
Stadsschouwburg Antwerpen and Capitole Gent:
In these theatres, the blocks are divided into even and odd sides. On one side of the auditorium, the numbering runs in even numbers (2 - 4 - 6 - 8 - ...) and on the other side in odd numbers (1 - 3 - 5 - 7 - ...). The seats with the lowest odd and even number meet in the middle.