I want a big taxi or Uber for 8 people.

Regular taxis and Uber will not fit 8. Need to call a shuttle or a van service

Uber's largest passenger service fits 6 passengers on a Uber SUV or UberXL hence cannot fit 8 people.  Some taxis utilize minivans, but those can only fit up to 6 passengers too.  

The best best would be to call a local car service that has van service.  You can charter a van like you do a limo service.  

ippei 1202

Uber Driver, CEO of TaxiFareFinder and Unleashed, LLC