Its okay, but there are better jobs for grabbing up IG thots. The most you'll be making is 42k a year, that's if you're lucky and work at Golds or the Y. The median is 25k so you'll more than likely be looking for another job after a few years. There are no promotions, so the job is best for meeting new people in higher job positions, which is nice and can provide you with some connects. Its probably the best part of the job - meeting people who can eventually help set up your future goals.
If you only want to do it to crush p*ssy, then I'd advise against, most of the time you're gonna get assigned an old person, usually male. You can try to coax some girls that you're a trainer which I used to do with another acquaintance of mine, but eventually you'll realize that its not worth "shytting were you eat" so to speak. If you're gonna pick up thots, best do freelance training, where you can go to her house or a park. The worst thing about balling out some chick is having her come every day just to talk and do very little working out, only to switch into "cardio mode" every time and just get on the treadmill.
Being a doorman at a dive scored me way more ass. Thots will do anything to get into a club, even more so if they want to frequent it.