Well, Ruby, I may be considered to be uptight, but I really don't think that it's ever appropriate to swear, use a lot of slang, or talk in text at work. It doesn't matter if you're 16 or 46 ~ it just isn't appropriate.

The customer is #1 ~ first and foremost. Customers do like to see people enjoying their jobs, that's for sure! But, the employees still need to behave professionally. Or, they'll go somewhere else. Somewhere that appreciates their business. (I'm a big stickler on this point, as so many places seem to have lost this concept somewhere along the way.) I would recommend basing your worth on the job with customer satisfaction. Not on how often the management calls you into work. Along the line, management will usually pick up on customer happiness associated with whatever employees ~ and then comes the reward. Let that be your guide.

The partying issue ~ I don't have an opinion.
Best wishes to you!