07/12/2012 at 06:00 AM EDT
let loose during a recent meal outing in Shreveport, La., where he is currently filming Olympus Has Fallen
"He can eat quite a lot," a waiter at Don Juan's tells PEOPLE of fitness aficionado Butler, who ordered – and consumed – fajitas and six tacos. "He ate it all, with all the trimmings."
Butler, an apparent regular at the eatery while he's in town, is, "Always really friendly and easy to talk to," says a different member of the staff.
Of this particular occasion, the source says Butler and the film crew he came with were "laughing and joking with each other throughout the meal." – Jane Bokun