I tune to whatever the band decides as a group.
Every cover band I've been in for the last 40 years tuned standard.
All of my original band's EP is in Drop D, but we tune standard for a lot of the newer songs.
One of my basses is set up for BEAD tuning because I sometimes need those extra notes but don't like 5s.
If you want to form a KISS tribute band, E flat tuning is essential.