The Del Close kind. Yesterday, until 1 July there are 390 shows of improv available all over the City. And a four day pass is $30!! An unheard of price and it’s a fun adventure. Once a year, the highs and lows of improv come out and strut their stuff. Some of it is terrific, some of the troops, well, you hope for better next year. The participants come from around the world to join in. Del Close was a Chicago based improver who believed that improv was an art. This year marks the 15th year of this annual salute to him.