Busboys and Poets hosted capacity crowds for debate-watching parties during the 2008 election. (Ricky Carioti for The Post)

The first presidential debate will take place from 9 to 10:30 p.m., and many nightspots — especially on the Hill — will be showing the debate with full sound throughout the bar. We’ve put together a where-to-watch guide that should cover all of the bases for most viewers.

Leaning left? Head for any of the Busboys and Poets locations; the 14th Street flagship was the place to be for Obama supporters in 2008.

Leaning right? Watch the proceedings at Tortilla Coast, where Republican vice presidential nominee Rep. Paul Ryan worked as a server during his days as a Senate staffer in the early ’90s.

Hate politics and just want cheap drinks? Try the $3 pony beers at Bullfeathers’ late-night happy hour or half-price beers at Lou’s City Bar.

Want to turn the event into a drinking game? Play debate bingo at Ventnor Sports Cafe.

And just remember: After Wednesday, there are still three more debates to go.

Read more from the Going Out Guide:

• Local restaurants and bars offer election-themed deals that allow you to vote with your tastebuds.