Back when I was young, many times we did not use a rack for 9 ball, especially for practice or low stakes. Wes would just place four balls on the foot rail, with the One Ball on the Right, place three balls in front of those with the Nine Ball in the middle and finally two balls in front of those.
Then slide the group to the Foot Spot, leaving room for the One Ball. Then grab the wing balls in the back row and put the One Ball on the Foot Spot and the Left ball on the apex in back. This worked well on relatively new or well-maintained tables with reasonably tight results. Of course, it's another time now and I imagine you rarely see that anymore.