I do not know that there is a min time for poker personally. If you are playing at a Casino some have rules and the one that I find at everywhere is, if you join a table you must play for an hour before leaving. Unless you lose all your money. We had a girl in our group that would leave as soon as she won a big pot, be-it 5 min in or an hour, so we told not to come back.I personally have 3 to 5 hours a day.
I like to spend at least 3 hours a dayI personally have 3 to 5 hours a day.