Is there a dress code for events?

There is no dress code, however some of the events have a theme. In those cases many participants enjoy dressing to the theme.

For the high teas there is a dress code focusing on the particular era. Also they have other events plan on dressing up.

I would say it depends on the event.

Not sure, but as a matter of course for any event at a place like this, I would go minimum business casual.