One of the focal points of the Lua community is our mailing list, which is very active and friendly; it has over 2500 subscribers from all over the world, including several Lua experts and the Lua team.
You can contribute to the community in several ways: answer questions about Lua (in the mailing list, in the chat room, in stackoverflow, and elsewhere), collaborate in the lua-users wiki, answer our survey, add a Lua logo to your web page, tell us about third-party sites related to Lua and papers and theses about Lua, and write tools and libraries for Lua and add them to LuaRocks.
You can help to spread the word about Lua by buying Lua products at Zazzle.
The main goal of the Lua workshop is to allow the Lua community to get together and meet in person and talk about the Lua language, its uses, and its implementation. Another goal is to help spread the word about Lua to industry and academia, taking advantage of the location of the workshop when possible.
If you'd like to organize a Lua workshop, please post a proposal in the mailing list.