In terms of the RAF:
Generally in phase 1 of the RAF interviews at OASC, the officers are looking to 'tick all of the boxes'. Your application forms are always used as a point of reference and it bodes well to make a copy before you submit it so that you can remind yourself of what you have said.
In terms of cultural experiences, there are many to choose from. It can be as simple as visiting a National Heritage building or even watching a musical in the West End. Either way the RAF look for that balance that you have as an individual. After all during IOT, socials are compulosry and include events such as wine tasting evenings.
Whatever you decide, remember that you can always spin it to your advantage.
Stefanovitch.