You can invite several people to a single 1:1 invitation.
Each participant can select one time slot, and once that slot has been selected, it becomes unavailable for the other participants. Read more about how to set up a 1:1 here.
PLEASE NOTE: Each participant will not see which time slot each other selected.
If you would like to create a group poll (an event that several people should attend) you can read how to set up a group poll here.