If Swash is grayed out, then you don’t have any Open Type fonts installed that include swashes such as Lovely Melissa, which comes with 1,372 glyphs and swashes for the reasonable price of $25.

Creampuff, the font used on the poster, is an example of a modernized swash font. This “Fuck Modernism” T-shirt by David Croy gives an example of a more opulent swash font.