It is possible to host an event at a library in Johannesburg, but it will depend on the specific library and its policies regarding the use of its facilities for events. Some libraries may have designated areas or rooms that can be reserved for events, while others may not have the capacity to accommodate events.
It is recommended that you contact the library directly to inquire about the availability and policies for hosting an event. Some libraries may require you to fill out a request form or to provide additional information about the purpose and size of the event. It is also a good idea to check the library's website or to call in advance to confirm the availability of the space and any policies or guidelines that may apply. You may also need to obtain any necessary permits or approvals for the event, depending on the nature of the event and the location.