Possible Clues:

• Is an although intended to sound at the end of the bridge?
• Point of tangency
• Arch-supporting structure
• Although the people are in at the end of the bridge
• Support just blokes in a team initially
• Nevertheless, chaps in a tango will give support
• A barrel people filled for structural support
• Meeting location -- chaps will want a large cask brought round
• Only males go in at such a meeting
• Arch support