EXCLUSIVE

If the guys from Boyz II Men are still hungry for justice ... they can finally take a bite out of Aaron Rodgers at their L.A. concert tonight ... where a food vendor is serving up an item in his honor ... a big, fat chicken sandwich.

B2M has a show at the L.A. County Fair in Pomona ... and to remind the group that Rodgers is still refusing to wear the 49ers jersey he's obligated to sport after losing a friendly bet in Week 1 ... a sports bar at the fairgrounds called Finish Line Sports is serving a special Aaron Rodgers Cry Baby Chicken Club.

The bar owner tells us each ARCBCC will be served on San Francisco sourdough bread ... with 49er fries on the side.

For the record, Rodgers acknowledged making the bet ... tried to weasel out of paying up ... and is now hoping everyone will simply forget it ever happened.