Not sure what happened, but I think the best approach for Viagra/Cialis is to simply mention it with the other information about the event.  
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Maybe a statement like:
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If you need or use Viagra/Cialis, don't be ashamed!  Be sure to take it {insert here} minutes before to make sure you're good and ready for me!
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Keeps it fun and let's them know you're ok with them using it.  

I would love to participate if my schedule permits.  

I met a provider at the Embassy Suites by San Francisco Airport one time she had booked a suite it would definitively accommodate  your needs.

I host GBs weekly in the bay and have been for 3 years. I rotate between SF, Oakland, and SJ. I used to go to Sac, but attendance got unpredictable, and it's too much of a drive for a dud. I usually have 2-4 women and I cap the guys at 20 so the suite stays comfy. My events always reach capacity, with disappointed gentlemen who didn't RSVP in time. I have curated a group of 900+ interested guys. A lot of guys who wouldn't see a provider feel ok going to a party. So I would say that, yes, there is an appetite for it.  

I do have a list of venues- you can reach out to me if you'd like. I don't want to list my faves publicly- I'd hate to lose them for some reason. I already got asked not to return to a favorite hotel because I can be quite loud when I'm having a blast.