Sorebackone

I do massage on the bed (especially if the clients room is too small to fit my table). Even a single bed is ok. Personally I prefer to give massage on a table because the bed is too soft and not ideal for a good massage but needs must. 
As for hotels…they don’t care. I’ve seen clients in some of the top London hotels, both with and without my table. Often the client meets me in the lobby because sometimes you need a key to use the lifts. Otherwise they just give me their room number and I meet them in the room. It’s all agreed beforehand. 

If it's a massage, then unless your provider is bringing a table with them, then the provider's studio would probably be better.  An established massage provider should have a decent set up and an established routine to welcome clients.  A massage on a hotel bed just isn't the same as on a table.
For other activities, your hotel room is generally a better option.  You're in an environment that you know is clean & comfortable with fewer chances of surprises and I think somewhere "neutral" works for both sides.

I tried to book with him before but we couldn't get the logistics to work (he preferred outcall) and I quickly found someone else - Paris has a big masseur market 😅.
Would be curious to hear how your experience goes — and specifically how "hetero" he is!