Here is the solution :
With the pingpong bicycle (for the brittish : wifwafcycle ) you finally can go anywhere and take your ping pong table with you.
Hours of fun ping ponging in the middle of fields, on pavements, on squares in the city, even on the road (this is not adviced)
are guaranteed with this easy to make yet proffessional grade ping pong bicycle.
Step 1: Find old bicycles and metal tubing
Finding old bicycles can be hard in some parts of the world, there is a good instructable on buying used bicycles if you click here, but i advice to look for free ones (i'm just cheap)
Then you need some metal tubing. if you're lucky you can find tubing like i did (already tube welded on 90 degrees).