I cannot work there!

Hello all, I'm going to get right to it:

I found employment at a local hospital. I began hospital orientation on 6/6/2011 and floor orientation on 06/12/2011 (I've worked a total of 3 twelves). Make a long story short, I don't like working at this place. The atmosphere is totally different than what I'm used to. Some nurses can be just total *^%%*%#@ to new employees. And I'm not a new nurse or even new to the workforce. True enough I can be mistaken for a young twenty something but I've been around the block and I'm thirty something years old. Anywoot, For example, I wasn't introduced to anyone and when I introduced myself or asked questions about floor policies, they would look at me like "are you talking to me" Well I just stuck by my preceptor and told myself you know "I'm not going to be here long working like this" Something just doesn't seem right working there. I doubt it was deliberate but I had an aide obtain vitals on a patient and fail to mention to me an elevated BP of 156/121. I kind of wrote that off, got a manual one myself. But after two nights of the same type of things, i get suspicious. I understand that people will take time warming up to me, however, just getting the cold shoulder from damn near everyone is not cool in my book. I've felt this way from day one of working there and rather than just push on and hope things get better, I'd rather just leave this job. I'm telling myself, what i'm doing is not bad because I'm still orienting there and in probation. I feel if they are able to terminate me during this period for whatever reason, I should be able to do the same right. I work at another facility PRN and was offered a full time position there. What do you guys think?