If you have a group who would like to pay for their Orders individually, you can make several partial payments on the Order.
To do this, click into the Order, then:
> Select Pay (or head to the Payments tab > add Payment)
> Other
> Amount - this will always initially display the full amount but you can edit this before submitting the payment
> The select the payment method i.e. Cash to submit the partial payment
> Once that's been added, repeat the process to add the remaining payment(s)