There's no universal answer; it depends on your priorities:
Membership fees vary widely. Compare tiers and included benefits.
Some clubs offer pools, tennis, basketball; others have limited amenities.
Convenience matters—proximity to home or work increases usage.
Check for specific classes (yoga, Pilates, Zumba) that interest you.
Atmosphere, staff friendliness, guest policies, childcare availability.
Research and visit both to decide which fits your needs best.