"k.i.s.s keep it simple stupid" or in other words "do not outsmart yourself".this might be accomplished by cautious thinking, listening (to your own heart and breadth) and decisions based on ... myself, nothing else i have to offer. dive deep into ...
so when i heard of pop-up shops, immediately pop-up concerts came to my mind.
in the discussion people changed it to jazz-up.
now for the real action, i would more prefer the term hold-up as used in the wild west genre.
the ideal situation is, to show up and play. in reality this only is feasible on jam sessions.
new as of june 2011: make it jazsoup, it is more mixed, mangled and boiling.
my translation of jazsoup into german is "ein marmaladebrot" just in case someone reads this or that.