Tournaments for 180 people are a very popular format. Hyper-turbo tournaments for $1, where they give out 500 chips and raise the blinds every two minutes, can be played in 1 hour.Turbo tournaments for 90 players, stack/blinds 1500/5, also last on average 1.5 hours, and tournaments for 90 players with long blinds of 15 minutes last up to 4 hours.Turbo Tournaments for 45 people, stack/blinds 1500/5, last about 1.5 hours, and with blinds changing every 10 minutes - about 2.5 hours.If you are a girl, or your friend plays poker, then I recommend the Women's series tournaments (not for you, for your friend, of course). Few people play them, so they last relatively short time.