Steve:  Steve took you to a nice picnic set up in Central Park.

Tony:  Tony's idea of a first date was helping him make modifications to his Iron Man suits.

Bruce:  You and Bruce went to the city and got some ice cream.

Thor:  You attended an Asgardian feast with Thor, meeting Lady Sif and the Warriors Three.

Loki:  Loki took you to Asgard, and showed you the royal gardens, letting you admire the beauty of the tranquility.

Clint:  You and Clint just went for beers at the bar for your first date.

T'Challa:  T'Challa took you to stargaze in the countryside of Wakanda.

Bucky:  Bucky took you dancing with him at a nice get together Tony had mustered up.

Pietro:  You two cuddled and watched movies all day for your first date.

Peter:  You and Peter sat on the fire exit of his apartment and just talked while looking out at the horizon.