An outdoor picnic
A picnic? At night? Surely that's not a good idea?
We think the opposite. Why? First, it will be dark, which is sexy. Glaring light isn't very romantic, but some dim, disinhibiting lighting is perfect. It also means you can get away with 'accidently' touching his hand (we said hand...) a lot more.
Another pro of the late night picnic is the temperature. We all know the temperature drops at night, so even on a warm day you might find yourself needing to borrow his sweater, or even better, sidle up for a little cuddle.
Pick a romantic spot - a park or, if you're lucky enough to live by the sea, the beach, grab some food, maybe even some candles and head down for a romantic evening out.