Related Clues:

• ''Gladiator'' sets
• Things with rings
• Some bowls
• Battle sites
• Qualcomm and Kauffman, for two
• Soccer stadiums
• Rock concert sites
• Sports settings
• Modern circus sites
• Ring settings, perhaps
• Gladiators' locales
• Some rock concert sites
• Rock-concert venues
• Battlegrounds
• Venues for Guns N' Roses