Design a chic, cool e-invite / save-the-date + rsvp to be sent by email for a high-end gems & jewelry trunk show

I'm planning to do my own trunk show in NY on Dec 14. Idea is to organise an intimate event whereby the women who come can touch and try my jewelry and rare, loose colored gemstones (create some sort of ‘Indulgence Party’ for the senses with something for the eyes, the taste buds, touch and feel, etc). But also to have something for their men who I hope they bring along, like a whisky-tasting or something. So, I need to have this cool e-save-the-date sort of invite to check out just how many ppl can make it. Goal is to either get about 12-15 people or 20-25 people. It will be exclusive and intimate. I need to know asap how many ppl can make it, so I can plan for the venue. This is quite urgent. Language should be in the style of high-end fashion magazines like Vogue, or sites like Moda Operandi / Net-a-Porter. Their copy is young, fresh and with great headlines. After selection, I can send some examples.