Started looking around at what's out there. The best thing I could find were both IKEA solutions. Either a series of LACK coffee tables (about $80 / 4x8 space) or a build-your-own table using:

 

1x http://www.ikea.com/us/en/catalog/products/00251135/

4x http://www.ikea.com/us/en/catalog/products/90217972/

 

I like the table better because it will be higher. Each one is about 2x4 and runs $20 a table, so about the same price as 8 LACKs.

 

The other option seems to be plywood and folding legs, which runs about 70$ a table and requires sanding, sealing, and painting. For $10 I'll go the IKEA route.

 

I think I will start with 4 tables and expand from there. I plan to use hook hasps underneath to hold the tables together but allow them to come apart if needed. 3.50 each. http://www.homedepot.com/p/Unbranded-3-4-in-x-1-1-8-in-Satin-Nickel-Hook-and-Staple-19764/204485787

 

So, has anyone else played with this idea? What did you find?

I already bought two LACKS from IKEA. Will buy more soon. They are perfect for your city layout. You can make your city bigger by adding more tables. They are cheap, stable and easy to mount. The height is perfect. Also for your back. 

I read a comment on another forum about the LACK tables changing sizes. They said it used to perfectly fit 2x2 modular baseplates, and now they are slightly smaller and it may overhang. What's your experience? A picture would be awesome too.

This is how I have my modular collection set up at the moment:

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