Starlit Days at the Lido (1935)

Basically this is a commercial for Hollywood's Lido Lounge and for MGM contract players. The Lido is a large watering hole; we visit one afternoon with an orchestra playing, all sorts of stars and would-be stars sitting at tables near the pool alongside paying customers, and bathing beauties parading and diving. The Lido's manager, Reggy Denny, introduces the stars in the audience. He's sometimes interrupted by someone who does a bit, sings a song, or otherwise entertains: most of these are novelty acts. By the end, everyone's having a swell time.

Unfortunately the movie Starlit Days at the Lido is not yet available on HBO Max.