HDR is only useful with static subjects,,people as in the OP's image aren't static subjects.. The slightest movement of a person (or persons) between exposures will result in ghosting or unsharp image..
All depends how much light is available. On a sunny-16 day, there's plenty of light; enough to squeeze off three auto-bracketed shots, with very little people movement at f/2.8 or even f/4. Especially if one is smart and bumps the ISO up to 400 for really fast shutter speed even at -2EV.