My girlfriend knows about my fantasy and while she's fine with me having it isn't really interested in actively pursuing it. That said, over the summer we have went out to get her some sexy clothes for her to wear out and we both enjoy it; she gets to wear clothes she doesn't usually and feels cute in them while I get to walk around with a girl showing off some extra skin.

Now I've heard about the bar game stuff where we go out and I sit apart from her and see who approaches her or tries to hit on her but she's not up to having something like that right now. The most I've seen happen is one time we went out and caught a guy near us eyeing her a bit. I went to the bathroom and when I came back he was casually chatting with her and then promptly stopped when I came back. As he left he said bye to her and the whole interaction turned me on (even though that was not the intent of the night out)

I was wondering with me being with her as well if there are any other sorts of 'games' or things of that nature we can do that lightly explore this fantasy? Any ideas are appreciated!