Thanks for your response. When I get to New York next week, I will check with the Laura Pels box office before getting in the standby line. My gut feeling is that it is simply a cancellation line in which they are allowing 10 (and only 10) people to stand inside the building out of the cold, but there is no guarantee any of them will be seated unless individuals return tickets for a refund. Generally there is at least one person who will return a ticket for a refund to a sold out show (especially when the weather is unusually cold).