Restaurant City is tapping into 1950s nostalgia and the the power of Dr Pepper in this week's new restaurant theme. Also, how many of you know that Dr Pepper has a jingle? The game's official blog posted a 1977 commercial for a jingle that remained in use until 1983. You can view and sing-along by clicking on the lyrics below, though personally, I like the one that uses Popeye the Sailor in the end:

Lot the 'Almost Famous' theme, where the game first parodied singers with foodie names like Lady Gaga as Lady Cocoa, or their 60s theme which included the Beatles, we've got some 50s rock n' roll stars and celebs here too.

The male star of Grease (1978), Danny Suko, played by John Travolta, has been renamed Danny Zucchini (costing 10 Playfish Cash) and his lady love Sandy Olsson, played by Olivia Newton-John, is now Sandy Orange (9 PFC). Famed rock n' roll pioneer Buddy Holly has been brought back as Nutty Holly (24,000 Coins). And Elvis is rockin' diners as the new Kitchen King (12 PFC).

You can also get a Dr Pepper Vending Machine for free (it earns 300 Coins every 4 hours and never breaks down) by mastering the Dr Pepper Float recipe, which requires 10 Dr Pepper and Ice-Cream ingredients total. And there's a Dr Pepper Billboard sign you can put outside of your restaurant for 500 Coins, but it'll only be on sale until September 1st.