>>3600225Tried B&W?
You can get faster film in B&W, ISO3200 or you can easily push to 800/1600 any normal ISO400 film.
Apart from the ISO though, artificial light is shit in terms of colour quality. To the point where you have to use a 2-stop 80A filter to correct it, rendering handheld photography very hard even with a fast ISO800 film (as fast as colour films will go).
Also what lens? Is it an f/2 or slower?
So, I'd suggest first try B&W and secondly an ISO400 or ISO800 colour film (without a filter).
