One of the first activities when planning any editing event is confirming venue plans. Once you have chosen a venue and negotiated a time for the event that is appropriate for your audience, it's important to think about other elements of using the venue for the event. If working with a partner, these will likely be simpler because your venue partner may be able to help.
Choosing a venue or promoting features of a venue may intrigue or encourage participation from both existing Wikimedia Community members and/or a broader public. For example, the '#72HorasConRodin Editathon at Museum Sumeo found that the novelty of staying overnight in a museum helped greatly increase interest in the editathon.