Do you think it is easy to avoid two loses every 37 spins?

[mr.ore]

You can choose whatever bet you want - even chance, number, whatever. Your bet must increase your bankroll by at least one unit if it wins, so covering all numbers is no option here

You can skip two spins every 37 spins, but you have to bet 35 times. It does not matter which two spins you decide not to bet. You want your "virtual" bet to lose, so you bet it won't win and it does not win - for example in 37 spins you bet that on 1rd and 17th spin number won't hit, and you do not bet, then it really does not hit - that's what you need to be able to do in order to answer yes.

Anyone able of doing that?

[Hoddini]

A "loss" by definition would mean any situation in which after betting you get nothing back or if you do, the total you get back is less than what you initially placed on the table. Going by this definition of a "loss," whenever you get back the amount you had initially bet technically it's not a loss. Statistically we'd expect 0 to hit once every 37 spins. Therefore betting equal units on red and black for 37 spins is likely to meet this condition if zero doesn't show up more than twice during those spins. So yes, IT IS POSSIBLE.

[BellagioOwner]

must increase your bankroll by at least one unit

betting equal units on red and black for 37 spins is likely to meet this condition

The OP stated by every bet to increase bankroll by AT LEAST 1 unit. So betting equals on Red/Black won;t actually qualify.

What could qualify though is betting 1 unit on 35 out of the 37 numbers. That would probably make the bankroll increase by 1 unit on a win and probably you will win 35+ times out of 37. The problem is though.... The few times that you lose you lose big!

If OP is trying to build a strategy on losing less than average or winning more than average etc this example won't be much of a use. I can easily avoid 2 or more losses in 37 spins and having my bankroll increasing on every win but that doesn't secures me that my bankroll will be positive with even 1 or 2 losses which will qualify

35 wins on 35 straight ups: +35 units
2 losses on 35 straight ups: -70 units.
total: -35 units in 37 spins.
Criteria of the poll met. Not sure you are satisfied with bankroll though