Easy Tables:
Using a certain combination of vertical pipes and minus symbols will trigger an "easy grid" or "easy table".
The bare minimum for a table is:
| Cell | Cell | Cell |
| (the second line starting with a pipe is just enough to trigger the table conversion)
...Which might be almost
too easy to use the Easy Tables, but it isn't too hard to avoid, either. If you just space in your |'s a little bit, and do something unobtrusive like drop a period in front of, well, at least every-other-line to stop it from reading as above, that should work. Like;
.| Mapstuff | Mapstuff
| Mapstuff | Mapstuff
.| More Mapstuff
Just empty spaces won't make any difference, though, it'll need like a . or a - or whatever you find least distracting that isn't |.
...Alternately; a little trickier for you, but cleaner for your readers, you can also use [code][/code] inside your pre tags -- that turns off all coding inside of it, so you won't be able to do, you know, anything else, without remembering to toggle that around it too, but it should work.
So:
<pre>[code]
| X |
| |_____
| Great |
| Hall |
| |
</pre>[/code]
Returns:
| X |
| |_____
| Great |
| Hall |
| |
...With no tabling.
And potentially,
<pre>[code]
| X |
| |_____
| [/code]<b><blue>Great</blue></b> |
| <b><blue>Hall</blue></b>[code] |
| |</pre>[/code]
...Can still allow,
| X |
| |_____
| Great |
| Hall |
| |