Possible Clues:

• Henry leaving part of city to fetch the girl for a party
• Trouble, with good number joining meeting
• An informal party
• Poor area losing hospital getting good number for meeting
• Informal meeting, and what can be found in 17-, 26-, 38-, and 51-Across?
• Some forget to get here for gathering
• Meeting
• A bit of a do
• Understand three got drunk, or 10
• Financial question (Part 3)