its been a couple of years since i no longer live there but
the
sports classic is a good event mostly with an interest mix of good level of basketball players, several teams with a good level used to show up, among them old (30-40) players that used to be very good or play with mexico national team, a couple of teams from canada and the us with one or 2 playes that used to play on a good level also, and an interest mix of younger teams, in order to play you probably will need to register your team or try to get in contact with somebody that has a team
other than that
like they mention, in front of the sheraton they have a couple of basketball courts, everyday from 4-6, lower level, most of the time 3 vs 3 or 5 vs 5
the better day is saturday
on saturday there is another place called aramara where a couple of friends used to gather and play, in the afternoons
hope this helps!
:)
regards