There is no standard size for conference tables. Companies make many different sizes because conference rooms come in many different sizes. You can buy tables that can be expanded or contracted depending on your space needs.
There is no standard for the size of a dressing room.
The standard size of a utility room in a house is 4 feet by 6 feet. This varies greatly depending on the overall size of the house.
12by 16
27m2
There is no accepted standard laundry rooms size just as there is no standard sizes for kitchens or baths.
650sft/room
"Everything Office Furniture" has various types of conference room tables depending on the size of the table and are a reputable company. This was the best site I could find researching this.
1:1.5
Depends on the size of the rest of the house.
A hotel lobby does not have a standard size
It really is a matter of choice and also the size of the room. Most conference room tables are rectangle but they do come in large circles as well. You can usually find displays of different sizes at office furniture stores.