Hi Emilia,
You are in for a special night at
Victoria and Albert's! If you are using Walt Disney World transportation, I think your best route is taking a bus to the Magic Kingdom Park, then taking the monorail to Disney's Grand Floridian Resort.
I checked the dress code and found the following: "Guests must wear proper attire. Men must wear dinner jackets with dress pants or slacks and shoes. Ties are optional. Women may wear a cocktail dress, nice dress, dressy pant suit or a skirt with a blouse. Jeans, shorts, capri pants, sandals, flip-flops or tennis shoes are not permitted." Whatever sleeve length you choose, I would be sure to bring a sweater or jacket because the air conditioning can be quite cool.
You also began to ask a question about non-alcoholic beverages. Victoria and Albert's is known for their superior service so I am certain they will be able to accommodate you and/or your daughter with a beverage you will be happy with!
In my searching I found another
website for Victoria and Albert's you might find helpful!
Please let me know if I can assist you with any other questions!
Wishing you and your daughter a magical vacation,
Amy H