TOPIC: Being able to chose double seats.

Hi,

Just wondering if anyone has a neat solution for the following problem.

Some of the events I sell a customer can choose to take up more than one seat.

So lets say I have 10 seats available for an event.
A customer can chose a double - and pay extra.

I think this may be able to be handled with custom fields....

But how to change the availability automatically - as obviously if 5 people choose a double then there are not 10 seats available....

What if I have a group booking where one of the people want a double?