Salesmanship is an important skill. Near the Tri Cities (Benton City) some 20 years ago there was a Friday night $5 Eightball tournament. I knew of 3 players that played my speed that were not allowed to play. I won it 6 times in a row and was still welcome.

Not 6 weeks in a row but 6 visits in a row. (Can't fish out the hole)
My M O for new little tournaments was to run the first rack when everyone is watching and measuring "the new guy". Then never run another. Just play a good solid defense that leaves the weaker players thinking they almost won. Usually it's the fear factor that gives them the twitch.

They feel they got their money's worth when they get to shoot. It is possible to give them a shot but not a chance unless they play Real Good.