The libertarians should have theirs in Denver or Seattle so that they can smoke blunts on the convention floor, while deriding Big Government.
The Libertarians would likely have their convention at a Holiday Inn or the like, and those places usually have no smoking policies in their public areas.
They had their last convention at a luxury resort outside of Las Vegas, and with Johnson being their best nominee yet, I can see them getting a decent venue for 2016. The Constitution Party and Greens will never be so lucky.