Unassuming but warm & homey watering tavern.
The tavern has been renovated in the years after the movie came out, but it still has the same spirit of a simple neighborhood pub.
You can easily recognize he table where Will and his friends had pints of beer by the pictures and quotes pasted all over it.
'Once Robin Williams committed to the movie, he wanted to get a taste of South Boston by having Ben Affleck and Matt Damon take him around the neighborhood. They took him to a rough dive bar called the L Street Tavern, where the colorful locals mobbed the actor and drunk guys tried to fight Affleck. Williams loved the place and told Weinstein they just had to use it as a location (even though his character wasn’t in any of the scenes that took place there). “So then we got a message from Harvey,” Damon said, “and he was like, ‘Don’t take Robin to any more locations!’ (source MentalFloss)
Matt Damon, Ben Affleck, Casey Affleck, Cole Hauser
Will Hunting has a genius-level IQ but chooses to work as a janitor at MIT. When he solves a difficult graduate-level math problem, his talents are discovered by Professor Gerald Lambeau, who decides to help the misguided youth reach his potential. When Will is arrested for attacking a police officer, Professor Lambeau makes a deal to get leniency for him if he will get treatment from therapist Sean Maguire.