Mixed Design
Current design frequently uses a combination of sloped floors, radii and risers. This provides patrons with easier access to aisles and exits while helping to improve sightlines.
It's not uncommon to see the seating closest to the stage arranged in a continental arrangement while the back rows are installed on risers.
Often seating sections will be in straight rows but the banks are angled toward the stage - this is very common in places of worship.