Waldorf, W, or Conrad Osaka for Solo Travel?

Traveling to Osaka end of September for the Expo. I’ve narrowed it down to 3 hotels and I’m mainly looking for the best social vibe (busy lobby bars, happy hours, places to meet people, etc).

Right now
• W seems the most social
• Conrad has amazing views
• Waldorf Astoria is brand new

Anyone stayed at these? Which has the best atmosphere for meeting people?

by ProfessorScam