Yes, CMs will often say it's ok to park in the hallway though I disagree that they "prefer" it. It is against fire code. Last year a poster here shared about a middle-of-the-night fire alarm and problems getting through corridors due to ECVs parked.
You are correct. The 2023 Florida Building Code, Section 1020.4 reads:
1020.4 Obstruction
The minimum width or required capacity of corridors shall be unobstructed.
Exception: Encroachments complying with Section 1005.7.
1005.7 reads:
1005.7 Encroachment
Encroachments into the required means of egress width shall be in accordance with the provisions of this section.
1005.7.1 Doors
Doors, when fully opened, shall not reduce the required width by more than 7 inches (178 mm). Doors in any position shall not reduce the required width by more than one-half.
Exceptions:
- Surface-mounted latch release hardware shall be exempt from inclusion in the 7-inch maximum (178 mm) encroachment where both of the following conditions exist:
- 1. The hardware is mounted to the side of the door facing away from the adjacent wall where the door is in the open position.
- 1. The hardware is mounted not less than 34 inches (865 mm) nor more than 48 inches (1219 mm) above the finished floor.
- The restrictions on door swing shall not apply to doors within individual dwelling units and sleeping units of Group R-2 occupancies and dwelling units of Group R-3 occupancies.
1005.7.2 Other Projections
Handrail projections shall be in accordance with the provisions of Section 1014.8. Other nonstructural projections such as trim and similar decorative features shall be permitted to project into the required width not more than 1-1/2 inches (38 mm) on each side.
Exception: Projections are permitted in corridors within Group I-2 Condition 1 in accordance with Section 407.4.3.
So, other than doors when fully opened and handrails, all other obstructions, whether temporary or permanent, are prohibited as they reduce the required egress width. I don't know why cast members do or do not suggest parking ECV's in hallways, but I do know the Code. Oh, and Group I-2 Occupancies are medical facilities, and more specifically for the exceptions, nursing homes, and the exceptions are limited to very specific conditions. There are no such exceptions given for Group R Occupancies (hotels):
407.4.3 Projections in nursing home corridors.
In Group I-2, Condition 1 occupancies, where the corridor width is not less than 96 inches (2440 mm), projections shall be permitted for furniture where all of the following criteria are met:
- The furniture is attached to the floor or to the wall.
- The furniture does not reduce the clear width of the corridor to less than 72 inches (1830 mm) except where other encroachments are permitted in accordance with Section 1005.7.
- The furniture is positioned on only one side of the corridor.
- Each arrangement of furniture is 50 square feet (4.6 m2) maximum in area.
- Furniture arrangements are separated by 10 feet (3048 mm) minimum.
- Placement of furniture is considered as part of the fire and safety plans in accordance with Section 1002.2.
The Building Code really doesn't like anything in a hallway serving as a primary means of egress, and it addresses the potential in multiple Chapters. The little alcoves you see in BRV, for example, where the hallway width widens, likely don't give you any leeway either, as parking a scooter there would encroach on the clear space required around the exit door for the room.
And yes, Mousekeeping leaving those linen storage carts unattended in the hallways would also violate the code. A conventional housekeeping cart left attended (with the CM inside the room with the door propped open) would not raise any concern, but a scooter left in the hallway, in the middle of the night, unattended in a possibly smoke-filled hallway, also possibly illuminated by only emergency lighting, would be another story.
ETA: to be clear, the FFPC (Florida Fire protection Code) adopts the minimum width requirements of the Building Code, and also only allows exceptions, in Section 19.1.6.1, for corridors providing egress for patient rooms in healthcare facilities (also, specifically, for "wheeled equipment").