In the center of the Flamingo Hotel & Casino, there is a garden. The Garden Chapel is the indoor venue inside the garden. Casinos can be mazes, so it's recommended to familiarize yourself with the area beforehand to avoid being late.
Attire is not formal, however feel free to wear anything sparkly that looks like it belongs in Vegas for the ceremony and dinner. It will still be a little chilly, even though it's Las Vegas, so prepare for that.
Go to the Travel section to view hotel information.
When you RSVP you'll be asked if you have any dietary restrictions.