NW Indiana (Chicagoland) Poker Rooms Rake

[damedley]

I mostly play online (for profit) and with friends (for fun). I visited the poker room at Resorts East Chicago recently and the NL game was $2/$5. The thing that surprised me was that in NL they take "time" instead of a rake. Every half an hour each person at the table has to give the house $7. At first this seemed ridiculously high, but I wanted to put some numbers on it and see where I come out.

30 hands per hour
20 hands per hour that would normally be raked
"Normal" rake 10% max $4
Average pot well over $40
Average 8 players at table
Rake would be around 20*4=$80/hour
Time is 14*8 = $112/hour

So if my assumptions are correct, the $14/hour "time" payments are about 50% higher than a 10%/$4 max rake would be.

Can anyone help me out with the numbers? Especially people who actually play at the local casinos? Also, speculation on how "beatable" a game this is would be welcome.