I aim to make the session as relaxed as possible and usually have tea/coffee as well as some things for the children.
As anyone who has children is aware they sometimes have an 'off' moment or day, and babies may want a feed or nappy change at unplanned times, therefore the session time may vary and is only an approximate time.
Please note, although every effort is made to make sure the venue is safe for children, the ultimate responsibility remains the adult/adults who attend the session with a child or children.