BTDT. I'd just pay the bill and then stop associating with them.
Funny thing I learned:
If you go out for drinks (and some food) with a bunch of 914 owners, the last guy there is gonna get stuck. IIRC, the last time I did that Milt got hosed even worse than I did. I paid about $40 for three beers and he ended up covering about $50 of the bill. I think it was Milt, not sure on that one.
But the last time I went out to a restaurant with 911 owners, the guy with the bill ended up saying "there's too much money here" and had to try and give some back. Seems everyone was just throwing out $20s to more than cover their share.
The waiter ended up getting a huge tip.
So if you're dining with with 914 owners, leave early. If they drive 911s, stick around