Dreams involving situations like this can often reflect feelings of discomfort, pressure, or confusion in your waking life, particularly in relation to authority figures or personal boundaries. Your boss taking you to a swingers club might symbolize a feeling of being put in an awkward or compromising position, perhaps related to your job or your relationship with your boss.

The fact that his girlfriend was initially interested in you could suggest feelings of attraction or desire for approval, but her later decision to leave might represent a sense of relief or a desire to escape from a situation that feels too intense or inappropriate.

Overall, this dream could be highlighting underlying anxiety about workplace dynamics or fears of being misunderstood in social situations. It might be worthwhile to reflect on your current feelings about your job, your relationships with colleagues, and any boundaries that may feel blurred. Consider what steps you can take to assert your own boundaries in waking life to avoid feeling trapped or pressured.