Possible Clues:

• Even when rebuffed accepting a role in social gathering
• Labour, say, undertaken by char fixes social gathering
• Entertainment for Underground traveller
• Affair Alice attended
• Social gathering in afternoon (as once in Boston)
• European bores knock pretentious American protestors
• Function Alice attended
• A bit upset, yet going round to a social event
• Afternoon social gathering - Boston had a good one in 1773
• Separate, yet comes back, outside, for afternoon get-together