We have 150's in my gym. I've been here almost 3 years and I can honsetly say that I have seen only my training partner and I use them. What goes on when I am not there, I dont know.
200, but I've never seen them used, I've never gone above 125 and that was kroc rows and shrugs. I've seen the 140's used once... All the weights 150+ just sit on the floor.
100 at gym a, 120 at gym b and 150 at gym c. I'm not at gym C much, only for the DB's though, i used up to 145 for presses but other than that I think they collect dust.
I've only got up to 100's at my home gym. Have thought a lot about getting 120's but....ehhh, I'm not as young as I used to be. One of the oly dumbell handles would be nice for DB rows though. 100lb dumbells are pretty light for rowing.