As I suggested, the button looks good, but it needs to be on the top
of the page.
Also, here are some issues with having minimum of 2 bookings.
I currently setup the system so that for the prices Adults and
Children, the clients need to book a minimum of 2 seats. This can be a
problem because if a customer has 1 adults and 1 children, they will
be forced to book 2 adults and 2 children. My recommendation is that
you put in your terms and conditions that there is a minumum
requirement of 2 seats, and that if only 1 seat is purchased, there
will be a fee upon arrival.
Another option is to change your pricing. Only way we can have minimum
of 2 seats is if you have ONE pricing option. Then we can fix the
system to meet your requirements.