This happens mostly to your storage rooms, being that you've placed too much in the room.
Even accessing the guest room list from within the effected room is a guarnteed crash.
IF you can be in the room with no crash, remove as many items in the room as you can before you crash again, and check the guest rooms list (while in the room) to see if you fixed your over-stocking problem. If the list comes up, you most likely fixed it.
This is problem #1 when building -Virtual Rides-