I once went to an awesome space party! They had a warmhole where you could sit and meditate... and we even had an acroyoga spot where we gave people first flights. Here is a Youtube video I made of the party.
Not sure if this is actually the type of ideas you are looking for, but I thought it was pretty quirky and fun.
Hmm glow in the dark might be a good idea for some portions of the venue, thanks!