I had the good fortune to see Warrant about ten times or so over the course of the late 80's and 90's.
I first caught them opening for Ratt (along with Great White) in 1989, then again with Motley Crue later that year. In 1990, I saw them with Poison. I wouldn't see them again until a bar show in 1994, after Jani left and returned to the band the first time. Over the next few years, I'd catch them in several bar shows int he Chicago area, including two New Years Eve shows (1995 & 1996). In 1997, I caught them opening for Alice Cooper (along with Dokken & Slaughter). The last time I saw them was in 2001, when the co-headlined with Ratt (along with openers Dokken and Kip Winger).
No matter who they were with, or how long they played, Warrant always gave their all, and Jani was a large part of it. It's a shame they got pigeonholed into the "glam" genre, because much of their 90's work showed they could get beyond that. But thanks to the rise of grunge and the decline of pop metal in the early 90's, much of the audience never got to hear it, and these days, the only thing we here from Warrant live was their first two albums, and a couple of songs from Dog Eat Dog (an album I can appreciate a lot more now than I did at the time).