A Conference Center has been proposed for Decentraland

Decentraland invited people to propose themed districts in Genesis City, the 3km x 3km city at the center of Decentraland, and allowed people to contribute land parcels toward these districts.

We’ve proposed a Decentraland Conference Center.

https://github.com/decentraland/districts/issues/27

Concept art from the Baha’i center and gardens in Second Life