Possible Clues:

• Classy Paris hotel
• 1975 Terrence McNally play
• Posh hotel, familiarly
• "Puttin' On ___"
• High-end accommodations, familiarly
• An Irving Berlin song, 'Puttin' on -- --'
• "What were you expecting, ___?"
• Posh place to stay in Piccadilly, familiarly
• Play for which 59-Across won a Tony, 1975
• 'Puttin' on --'