Hi freedom23

Quite a few platforms/casinos let you play multiple seats...limited of course by how many other players there are at the table.

I'd suggest Evolution Gaming blackjack or Playtech blackjack tables. You're a better chance to find largely vacant (and low limit) tables at casinos with very large private table ranges.

To this end, I'd suggest you give the casinos offering Blackjack Classic tables a go - 32 of them...all low limit. You can probably find a whole table to yourself and play 7 seats!

Another option, Playtech's Unlimited Blackjack table. No matter how many players are playing it, you can play 1 to 5 seats/boxes. Not a classic 7 seat table though.