If you're a cinephile, Yerevan offers you Moscow cinema located again in Abovyan street, Cinema star (you can find at Dalma and Rio malls), Kinopark (Yerevan mall) and KinoHayastan (located at the street of Zoravar Andranik). Read about Movie-theaters in Armenia
For other means of entertainment, visit Yell extreme park ( find the info about it on their official website) or Play city (35 Acharyan str.)
Visit some museums in Yerevan, go to The Republic square watch the fountain show in the evenings, just walk to Cascade and enjoy yourself.