Typically, swinging activities occur when a married or otherwise committed couple engages in sexual activity with another couple, multiple couples, or a single individual. These acts can occur in the same room (often called same room swinging) though different or separate room swinging does occur. On these occasions, swingers will often refer to sex as play and sex partners as playmates. Occasionally, one party of a couple will not be interested in joining the swinging lifestyle. This party is typically referred to as the "hold-out" while the other party is referred to as the "desirous party". Thus, the "desirous party" is the one party of a swinging couple who seeks to be in the lifestyle as opposed to the other party who does not.