Hi, how do you lock a room when having an event once you don't want anymore participants?

Click on your room name, then click on the lock in the box that pops up, then save it.

Yes , you are correct you do have to click on your room name to lock the room . But when you make an event you cant click the room name . It shows the event name . And gives you the option to end your event if you click it . If you leave the room you will see your room name and you can lock it . But then if you leave the room after you locked it the door will be unlocked . I think you can lock it before you make an event and then make one . But then of coarse no one will come . So while you have an event up you cant lock the room . Or change blackspace walking .