I just finished 3d printing a small boardgame table from the StageTop Kickstarter. I wanted to have a portable surface I could use for playing boardgames on a couch, and can then move to a table, and so far it's working pretty well. It has a little bit of flex, but not enough to move any of the pieces.
Here's the link in case anyone is interested (I'm not affiliated with them, besides backing the Kickstarter):
https://www.myminifactory.com/campaigns/stagetop-the-3d-printed-gaming-table-1550
I have a 3D printer but a piece of wood seems like a much better solution in my opinion. There are detachable legs in most hardware shops ready to use or you can make your own. Still a good idea to transform a coffee table into something back friendly
That's what I was going to do originally before I saw the Kickstarter. The reason I went with the printed table is I didn't want to be locked into a specific table size. With the printed table I can resize it based on the game I'm playing, but having said that, a wood table would have better rigity and would probably be less expensive.
This took around 4 rolls at about $15 per roll + cost of the Kickstarter.