Can I buy tickets from box office within the week for a show in August? Or is preordering only available via credit/debit cards?

It is impossible to talk to anyone at ticket office

Call box office

Call

Call the box office

Depends on the event. Some artists allow it, others make you buy via ticketmaster/live nation etc. Best bet would be to order online. Just to be safe, bc I know that's a for sure. Otherwise I'd suggest calling the venue and seeing

Preordering available only through online ( credit/debit/paypal).

Right and i understand that. I just meant if i got there within the next few days can I pay cash for two tickets in August if they aren't sold out? Because I know everything is via credit cards and online now.

Depends on the demand for a particular show. Some sell out faster than others