We have one of the best basketball programs in the country!
If you are in town anytime between November and March, check the schedule and try to attend a Spartan's home game at the Jack Breslin Student Events Center. There's always a great atmosphere and a very high level of play, especially once Big Ten matchups start in January.
Tickets can be hard to come by for the really big games though, but even then there are always scalpers outside the stadium. Prices can get pretty steep though.
The Breslin also hosts plenty of other activities throughout the year including concerts and various other shows.
The Lansing area does not have many places to dive, but Lake Interstate on the southwest side of town off I-69 is where local divers go to get some easy time in the water. There is a variety of fish life and underwater plants to see. Visibility ranges between 10 and 20 feet. The lake is diveable from mid-March to mid-December.
Equipment: Inquire at ZZ Underwater World on Michigan Avenue in Lansing's east side. The phone number is 485-3894. They'll even do a Try Scuba course with non-divers at Lake Interstate for $25 (all gear and air included).