There is plenty of hotels within walking distance from CEVRO Institute in the historical center which you can book on-line. These are just two of them where our visitors and speakers like to stay.
fusion hotel prague (especially younger folks will love it!)
If you need assistance, feel free contact our travel agent Michaela. Make sure you book any hotel through her as she can get you substantial discounts (in those two and many other hotels).
E-mail her at email@example.com and mention PCPE.