I don't think you need anything close to 150 until your heavier...80 should be way more than enough until you gain 20-30lbs of muscle(if thats your goal). I think only the biggest of lifters and people that terribly stress their muscles to failure on a daily basis need to eat over 150g a day. I've been living off of 30-40g or so trying to loose muscle and it worked when I was 270lbs going down to 205 but now that enough to keep me from losing what I have...which makes me think I've gotta ride 4-5hrs a day or drop down to 20g which is pretty much impossible to do while eating a balanced diet over 1500 calories.
The people at the gym aren't vegan, and I think they have a meat-mentality about protein, but I am not sure. From what I'd been told about how much protein you can actually use to build muscle, that's how I ended up aiming for 80g I still don't know for sure what to do, harr