One of the first things I did in designing the booth was deciding that I wanted a distinct gallery feel to the space. When it comes to setting up in convention centers, there can be anything from carpet to a bare concrete floor. I considered an area rug, but then found these great spongy tiles (that have the same sponginess as the tiles used in milking parlors).
I settled on two foot by two foot interlocking tiles with a wood grain pattern. I also bought a zippered carrying case for them. The portability also made them more appealing than an area rug.
As you can see they are pretty easy to put together. My youngest was having a great time helping me make sure the tiles were going to work. The great thing about these mats too is that they should help people (and me too) feel comfortable while standing.