Pretty normal behavior, in my observation, though I don't usually see it to this extent as late as 8. She's taking the my-way-or-the-highway approach to play, which is rarely a good social strategy in any context, but exactly the kind of self-centered attitude you expect in young children. Playing with other kids requires give-and-take, and seeking of common interests, skills that doesn't come naturally. These are social strategies that have to be learned, and, once learned, they pay off big later on down the road.
I would sit the child down and explain that different people have different interests, and she has to be accepting of those, just as she'd like people to accept hers (insert a couple of anecdotes of how DW and I differ in our interests here for examples). Then I'd start looking for the interests she has in common with these kids, and encourage her to emphasize those.
