CSU plays their games @ The Wolstein Center...originally 13,000 seats...about 6-7 years ago, they re-arranged things, put up a big curtain, and the capacity was reduced to 8 or 9,000. Only VERY rarely has CSU filled it up for a regular season game. I was in attendance in 2003 when they gave North Carolina a game, but lost.
The arena was conceived and ground was broken very soon after the "run and stun" Sweet 16 run in the late 80's (part of the "Season on the Brink" IU story)...but CSU got into trouble (involving Manute Bol, primarily!) and the program has never recovered...and the whole basketball enterprise at the mid majors is not what it once was. Last night, maybe 600-700 people in attendance. It's a good entertainment value but CSU struggles to recruit good players. The students (heavy commuter school) aren't very interested and, for them, it's free to attend. When CSU develops a player (like Bryn Forbes), the guy usually moves on quickly (Forbes to MSU and still playing in the NBA).
CSU has announced a new "master plan" for the school that includes demolishing The Wolstein Center, replacing it with something much smaller in the 5,000 seat range...and closer on the campus to where the students live. The Wolstein Center never made much sense...about 3/4 miles down the road from Rocket Mortgage Fieldhouse (Cavs). It's now pretty dreary and, I'm sure, is a big money loser for the college just paying the heating bill.