Though the gay element was included fairly late in the movie, in theory it's integral to the plot.
In the last few minutes of the movie, we learn that the main male character and one of the other guys are lovers. The hostess of the 'murder weekend' is blackmailing the two of them and threatening to expose their secret.
Unfortunately, the 'surprise' of the affair between the two men is shoved in at the end. It doesn't really surprise, nor does it really seem to matter.
This is not the best of DeCoteau's movies, and is not overly recommended