The Halo Night usually starts at 8 pm every Wednesday evening with a pizza break. In "The Dumpling Paradox", when Howard refused to join, the guys managed to have Penny to take his place. She proved to be very talented at Halo. She "killed" Sheldon at least three times, once with a Covenant Plasma Grenade and another with an Incendiary Grenade. Sheldon was known to be both a sore loser and a cocky winner. The next Halo Night, in which Howard rejoined them, Penny and her friends walked in on the group and said " Hey guys my friends and I got tired of dancing so we came here to have sex with you." The guys continued playing completely oblivious to what Penny had just said.