Folks,
There’s Lua workshop in Vilnius where you can meet the Lua’s chief architect and hang out with @britzl @sergey.lerg @AGulev myself and more.
http://www.lua.org/wshop18.html#register
Vilnius is cheap to travel to and stay in. I’ll put down a guide if a bigger crowd would come over. Or just ask 
Wizzair and Ryanair fly to VNO and KUN. Also lots of cheap flights via MSQ and KBP.
Stay here or here to get the vibe.