Standard English rules still apply on BWW.
If you call the theatre and say you already bought Partial View Tickets, but may not be able to make it in so you wanted to find out how good the view is. If it isn't great, you'll give them to a friend dying to see the show.
My friend acquired partial view for Wicked and I explained the situation and said I don't want to come in if the view isn't good (already making it clear I wouldn't try to sell the ticket back) and he went through everything of the view. And he was dead on balls accurate.
You may not need the song and dance, but it doesn't hurt.