When Roger starts trying to learn guitar, his instinct is to put it on the ground and straddle it, implying he's never seen anybody play the guitar before. But he made this bet after watching the coffee shop guy play, he saw guitar playing just a day or so ago.
When Steve is promoted to Assistant Manager, he is handed the keys to the "Teeth Whitening Strips" and the "Liquor Over $40". By law, liquor is not sold in grocery stores in Virginia. Liquor is only sold at the Virginia ABC Stores.