It is generally not considered appropriate to wear a bikini to the gym. While some gyms may have pool areas or other areas where swimsuits are appropriate, most gym settings are designed for athletic wear that is more practical and supportive for exercising. Additionally, wearing a bikini to the gym may make other gym-goers feel uncomfortable, and it could be seen as a distraction or an inappropriate outfit for the setting. It’s best to opt for athletic wear that is designed for exercise, such as sports bras, tank tops, shorts, or leggings, to ensure that you can move comfortably and safely during your workout.