Randomly select one of 3 hubs with command blocks [duplicate]
Solution 1:
Summon an armor stands at the spawn point of each of the hubs like this:
/summon armor_stand ~ ~ ~ {Invisible:1,Marker:1,NoGravity:1,Tags:["hub"]}
Then just put this command into the command block under the pressure plate:
tp @p @r[type=armor_stand,tag=hub]
This teleports the player to a random one of these invisible armor stands.