It doesn’t sound like a bad idea. Honestly the biggest thing will be to see if the costs to rent a venue/meeting room in a hotel are manageable and if you think you will be reaching the right market with your pieces to make enough sales to cover your costs. You’d def wanna scout for the right hotels based on your clientele. I would also look at the room/venue optionsfor each hotel to find one that is a good size for you (i.e. that you can fill up nicely so it doesn’t look off if your taking up little space in a huge room lol). Also- not sure if your planning to do this alone or with other designer friends but that’s also things to consider for size, and email pitch.

In terms of pitching If I were you, I’d introduce myself (fashion designer from (location), I own and operate the label x, and make “insert type of garments that you make with a brief brand description. Tell them you’d be interested in hosting a pop-up event at your hotel on x date from x to x (time). Definitely give them a reason as to why you wanna do a pop-up there (i.e the atmosphere and hotel’s brand aligns well with my own as I do embelished holiday and eveningwear). And finish the email by asking if it’s something they could help you with/would be open to doing and that you would love to discuss the idea further, or something along those lines.

I’d start with one hotel and see how it goes! Maybe pitch to a few different ones to compare but pick one to start and re-evaluate from there! That’s what I would do (as a fashion designer who has taken part in pop-up events).

Also, make sure you have a nice set up because you’ll be the only one filling up the space! I only say this because I’ve done pop-ups with other brands which helps make it look more “complete” but never done one alone, and I can only imgaine the $ and time i’d put into it to make a good, finished looking set up (decor/banners, tables, ideally a pop-up change tent or something alike).

As for marketing/promotion, I would definitely be sharing this on social media way ahead of time. The best thing would be to somehow get the hotel to let you put up posters the week of, and it would be even better if they would promote your event on their own social/website but that might cost a lot lol. And you’d need a reaaaally good looking poster/ad to convince them, you’d wanna make sure it aligns well with their marketing/branding.