Support for multiplying the payment per person

[Hybes]

Is your proposal related to a problem?

I want to have a slot for 4 people, but a user should be able to book 1 to 4 people in, in one booking.

However, at the moment, it is still the same price if they add guests.

Describe the solution you'd like

We should allow support for 'seats' and guests, or some merging solution that essentially allows 1 person to book 4 people in, and be required to pay 4 times the cost.

Describe alternatives you've considered

Currently users all need to book separately, or book as 1, with 3 guests for example - but only need to pay once.

I want the event to be 'Seated' though, so we have a limit.

Additional context

Has lots of use cases, and would be useful for a range of scenarios I think.

Requirement/Document

N/A

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[Hybes]

Very similar, but not the exact same as: #14914