Why is this thread in "General Residency Issues" forum and not in "Clinical Rotations"?
Harmnot, no one is saying that you have to be a comedian. However, you do need to get along with your team, and the best way is to be their buddy or at least take on some semblance of it. Sometimes being nice, eager, and helpful is just not enough. Offer to pick up dinner if you are on call with your team. Recommend a good movie you've seen recently (with an intelligent comment on the side). Be interested in your team members.
It sucks when your hard work and enthusiasm go unrecognized. I take it from your concerned tone that you are an MS3. At this point, you have two choices: 1) step up your game and try to pull the team towards you, as others have advised, or 2) accept that it's too late to fix this situation and start anew with following rotations.
If you're nearing the end of this rotation, I highly recommend 2).
But clearly this is causing you emotional grief and you feel the need to reclaim your status as an abused, pimped medical student. So go ahead, ask your senior resident and attendings how you're doing and how you can improve. I wouldn't bring up the issue of your "not being recognized as an equal" to anyone on your team, because that will just make you sound whiney. Talk about it with your advisor/course coordinator, though, so that he is aware of the situation. If you haven't done so already, know everything about your patients and maybe even read up on other interesting cases on the team's service so you can ask questions. Show up early to everything. Look clean and wholesome. Smile. Be your awesomest without looking too eager to be accepted or making other students look bad. Keep working on your physical exam and oral presentation skills to make them superb.
Hopefully you won't have to work with this bunch again. I don't know if your current rotation is in a specialty you want to go into, but if it is not, save yourself a heartache and focus on being stellar in the future rotations, just as you have done so in the past rotations.