You can find an excellent selection of 16:9 projector screens here: https://www.projectorscreen.com/projector-screens/format/hdtv-16to9
Here are some 4:3 https://www.projectorscreen.com/projector-screens/format/video-4to3
I'd recommend going with either a Stewart or a Screen innovations projector screen as they're much higher quality.
Because you'll be using it in a sports bar with more ambient light I'd recommend getting a screen with a higher gain so it will reflect more of the light from the projector.
I'd probably also suggest getting a white projector screen as they'll also reflect more light.