No. The Psychedelic Loft in Schiedam does not currently have air conditioning.
The historic ground floor space stays relatively cool thanks to its depth and limited glass. On a 38°C day it was about 26 to 28°C inside, using sunshades, closed doors, and additional fans.
If you need more cooling, they can provide cool pads, ice, ice pops, and frozen towels, and sessions can still proceed during hot weather up to about 40°C. For practical details and updates, see this page.
Hope this helps.