Yes, you are right, no reservation needed. You don´t need to be worry about overcrowding.
„As we are a club open to all, and no reservations are not necessary for us, unless otherwise stated in the program for the day. Membership fees are listed each with specific actions.“
Fees: for single woman we do have a special rule „Women have every day all inclusive offer for CZK 100 without limitation.“.
Looking forward to see you.