I've experience a few MMF with some ex-gfs and once a FFM with two girls that I met in a bar in Brasilia. But one of the best times was with this girl Renata. We went to a bar and when we left we started making out on the hood of her car. Mind you, this was a busy street, right in front of the bar with everyone leaving and looking for their own cars. We got into the back seat and started having sex (there is more room in the back of a Fiat Uno than you would think). The windows were tinted, but of course not the windshield. When we finished we had quite the crowd watching.