That is our theme this year too. I added a link to my pinterest board below.
We are going for a retro art deco look and the majority of our decorations will be some play on the NYC skyline theme.
I also plan to have a photo booth area with some props.
We don't have games, our house and garden get too crowded, we usually have 50-60 adults and 10+ children.
I did have karaoke the last few years and folks really seemed to like that.