alabama's coleman colliseum is just outside that 25 at 15,383 capacity. we fans and the basketball programs have been clamoring for a new arena for years if not decades. it opened in 1968.
in 2018, they finally approved a project for a new arena with a 10k seat capacity, which, imo is about perfect for bama. in a year like this one, where we had probably our best season ever, it could have filled any of those arenas on the list. but on a normal year, even on what i hope to become a 'normal year' (consistently comfortable in ncaa's), i think filling up 10k is about right.
the bigger issue, though, is coleman is just so far out of date. covid threw a halt to those plans, but they're still on last i heard.
tuscaloosa and bham aren't very big, but they are sports crazy and will show up to support any and all things bama. look at the tv ratings for bham. routinely near top for random sports things they have no business being in.