I pass this place every day on my way to work, but it took me a couple of months to figure out what it was. Whimsic Alley is a store exclusively devoted to Harry Potter. If you are a geek like myself, then you can stop by to pick up wands, costumes, posters, or any Harry Potter paraphernalia. The whole shop area is set up like Diagon Alley
They also have a banquet area that is designed to look like the Great Hall. They host High Tea here monthly.
Friday, April 13th they will be hosting a Harry Potter themed murder mystery dinner. Tickets are a bit on the pricier side ($60) but the evening includes the interactive mystery, an all you can eat buffet, and an open bar. So go dress up like a wizard, get a couple of drinks and figure out who has the Dark Mark.
You can buy tickets here