There are a number of people (like us) that don't mind forward couples, to a point. There is a line that can be crossed and it is not always clear where that is because everyone is different. Take me for example. If a girl came up to me and grabbed my package and asked if she could take that thing for a spin I'd likely be all in...lol I do have friends that are that forward, but it's of course different that first time.
Like anything else there are different ways of delivering the same message, While the girl in my above example would be an exception, generally people can cross that line is if they come across as being all and only about the sex. Hard to describe, but you know it when you see it. It's like EVERYTHING they say is strictly about sex. In that case, there isn't a lot of conversation and, unless we both find someone hot, the answer is generally "No". Yeah, we do actually say "No" to people once in a while. Crazy, huh? ;-)
It is OK to let people know that you feel awkward asking. Sometimes we'll answer the unasked question by saying something like, "Not sure how you feel about us but our answer would be YES, just so you know". It lets the others know there's interest but doesn't put them on the spot or come across as being too forward. We generally just carry on with our conversation after, but sometimes the others will say, "Want to get a room?", or "Glad you asked."
It does help to keep in mind what you are at a swinger party for and the thought that others are likely there for the same reason. Of course the primary reason to do any of this is to have fun, and that can happen with or without sex. So, if you missed a signal/opportunity and still had fun, mission accomplished. It's a smaller LS world than a lot of people realize and very likely you will run into the same people again.

