I used to bowl two years ago for Oberlin College's bowling team in Ohio. Most of our tournaments were formatted in the following way:
5 team games, where in each one, each member would roll one game, and then all 5 scores were added up - and after the 5 team games, we would do 15 Baker games in blocks of three at a time against another team. In the Bakers, one bowler would bowl in the first and sixth frames, the second bowler in the second and seventh frames and so on.
Earlier in my college bowling career modified house shots or sport shots were typical, but toward the end of my college days, it seemed like almost every tournament was either a PBA pattern, or a modified PBA pattern. I remember the modified Shark pattern and the modified Cheetah patterns. Hope this helps answer the initial question a little more in depth. - SimplyAmazuring