Do you need a reservation for a big party? Like around 8-10 people

No

I went there with a party of 8 on a Saturday and was seated I called ahead an they told me no reservation to just come and wait to be seated .... We waited like 5minutes

Yes and its worth it!!

When I went it was only for a party of two and I didn't have to make reservations but to be on the safe side I would call just to verify