Also don't talk about the 'free soda', 'nerf gun wars', 'air hockey table' or something else that indicates you treat your employees like children. I also hate the ninja/rockstar stuff.
When you buy your own food, you pay with post-tax income. The employer can provide that food for less money than it takes to pay you the extra money to buy the food. Alternately, you can get better food.
Travel time can be hours. You may need to struggle with traffic or wait for a train. You may need to get all dressed up for the cold and then shovel snow off your car.
The whole point is all that stuff costs much less than any meaningful pay raise.