Absolutely...you have kinda nailed it here with both comments.

My best "customers" were actually people who had a good deal of "income" (remember...there are many millionaires in prisons all over the world) who really didn't mind losing $1 a game 1. to get better and 2. for a safe social interaction with someone like myself who has a sparkling wit and overall interesting things to say (so I've heard :)

Prison isn't really that much different then life, but the sociopaths you meet there are far more likely to be violent then the ones running your company.