Many happy returns to the Malt Shop (809 W. 50th St., Mpls., 612-824-1352, The south Minneapolis classic is marking its 40th birthday all month with special events, but the one aimed at bargain hunters is taking place on Thursday, when the restaurant's first 40 diners can purchase a cheeseburger-fries-malt combo at the 1973 price of $2.15. After that, the price is $2.99, while supplies last. Diners on the big day will also receive a free piece of birthday cake, while supplies last.