i dont mind bringing different groups of friends together although i prefer to keep the different groups seperate.
i just feel its easier to talk that way, at least the topics are common or we have common friends within the group and i dont have to divide my attention to cater to the different groups.
i prefer to give undivided attention to each group or individual i meet up with.

i know its a good way to introduce people across different groups but sometimes that's when situations arise.
it can be for the better or worse.

i dont mind introducing my friends BUT IF I DO know you are trying to make use of me to get to my friends to make use of them for your own interests..

i'll have some words for you.

expanding your social circle?
friend poachin?
friend leeching?

depends on how you handle the situation.