This weekend, get a dose of deja vu at events featuring stars of your favorite throwback TV shows, including a “Jersey Shore” star and singers from “Glee.” Then, take advantage of weekend-long free entrance to some of D.C.’s more obscure art and history museums.

Friday

DJ Pauly D at Decades

Get your groove on as “Jersey Shore” star Pauly D takes over Decades’ DJ booth. The popular reality television star has made post-“Jersey Shore” appearances on the E! show “Famously Single,” but he’s returning to his original mantle as a DJ with fist-pumping beats at the Dupont Circle bar this weekend. The event will take place on the 2000s floor of the three-story throwback nightclub. Guys can enter without cover before 10 p.m., and ladies get in for free before 11 p.m., but expect the club to be packed with fans trying to catch a glimpse of the famous guido.

Decades, 1219 Connecticut Ave. NW. 9 p.m. to 3 a.m.

Saturday

Dupont Kalorama Museum Walk

Get on your feet with fellow art and history fans as you tour through five of D.C.’s art museums for free this weekend. During the 35th anniversary of Dupont Kalorama Museum Walk, some of the neighborhood’s museums will open their doors to guests for free, allowing you to save about $10 that you’d typically spend on admission. Embark on a daylong walk event through the works of Dumbarton House, The National Museum of American Jewish Military History, The President Woodrow Wilson House, Anderson House and The Phillips Collection. Or you can drop in and out of the museums over the weekend.

Multiple locations around Dupont Circle. Saturday and Sunday. Free.

Sunday

Lea Michele and Darren Criss at the Kennedy Center

Two leading actors from “Glee,” your teen television guilty pleasure, will perform at the Kennedy Center this weekend. Lea Michele and Darren Criss were stars of the stage before appearing on the small screen and have since held starring roles on Broadway and high-profile TV spots in other shows by Ryan Murphy. The duo’s star power is almost as big as their voices, so prepare to be astounded by performers who know how to sing out into a crowd. They will perform duets and solos of Broadway hits, numbers from “Glee” and original songs from their recent solo albums. The two singers embarked on their nationwide summer tour last week, so a show at the Kennedy Center is one of the first opportunities to see the duo live.

John F. Kennedy Center for the Performing Arts, 2700 F St. NW. 8 p.m. Tickets $59 to $129.