Which of the following represents a violation of ethical codes for massage therapists?

Engaging in sexual misconduct with clients is a clear violation of ethical codes for massage therapists. Ethical standards in the profession prioritizes client safety, dignity, and well-being, establishing boundaries that ensure a professional and therapeutic environment. Any behavior that crosses those boundaries, especially involving sexual advances or inappropriate conduct, not only harms the client but also undermines the trust necessary for effective therapy. Such actions can lead to severe repercussions, including the loss of licensure, legal actions, and damage to the therapist’s professional reputation.

The other choices provided don't infringe on these ethical guidelines. Practicing on weekends is permissible, as therapists often schedule clients when it is convenient. Offering group sessions can expand accessibility to services and provide a community-focused approach to wellness. Providing gift cards can be a form of marketing and client appreciation when done appropriately. None of these options involves misconduct that jeopardizes the ethical standards of the massage therapy profession.