Pretty much anytime i feel like a game or 14  thats how many are set up and playable at the moment.

as my collection has grown, games have started migrating into the house, there are currently five in my loungeroom and four in the spare room, and its getting too cold at the moment to be out in the garage at night playing the games in there, so the games inside get a good workout most days. Sometimes i'll get a quick game in before going to work, and i'll often play a few games after work... bit of stress relief