Conversation so far:
Did the band reunite during this time frame?
In 1990, the former line-up of van Leer, Akkerman, van der Linden, and Ruiter reunited for the first time since 1975.
Did anything particular happen during the reunion?
The four played a 40-minute set at the Americahal in Apeldoorn on 20 April that was broadcast as part of the Oud van Goud television special.
Was there anything else important happening?
On 17 May the group, minus Akkerman, mimed a performance of "House of the King" on the Service Salon television program on AVRO-TV.
What were some of their songs?
Hocus Pocus.

Question: Are there any other songs?
Self-contained rewrite: Besides Hocus Pocus, were there any other songs that Focus played?