Our website has a fancy super-involved feature that allows us to draw up an exact schematic replica of our reception space, make little tables and figure out the seating arrangement. Unfortunately all the complexities were too difficult.
So we moved on to creating an Excel spreadsheet to manage our seating arrangement. But that was also not working.
So we pulled out a notebook and started writing things down in pencil, yet weren't able to visualize it.
And finally we found a successful method. Little pieces of paper with people's names on them, spread out across the floor. Who needs technology?