for later in the session. If a session performer is exceptionally skilled, the leader may encourage her to perform a number of songs or tunes. On the other hand, if a player or singer does not perform that well, due to a lack of experience or technique, the leader will thank the individual for his or her performance and then diplomatically ask for the audience's applause, while at the same time inviting a more seasoned performer on stage to take the first performer's place. Less skilled performers may be asked to participate as a member of an ensemble, playing an accompaniment role in the background. Some session leaders use a sign-up sheet where participants can indicate their interest in performing. The session leader is often an accomplished singer and/or instrumentalist, and she typically performs throughout the evening, either in solo roles or "comping" for (accompanying) other performers. The session leader's ability to perform helps to fill in any periods during the evening where no participants have asked to come up. Purpose and recompense The performers and singers who participate in an unpaid session typically do so for the enjoyment of performing and for the applause they receive from the audience. In jazz, jam sessions are often a good way for players and singers to meet other performers; in a sense, it can serve as a form of business networking for musicians. At a jam session, jazz musicians can hear other performers on stage, meet with them, and consider certain individuals for collaboration on future paid gigs or recording sessions. A jazz singer, for example, might use attendance and participation in jam sessions as a way to find potential members who she could hire as a rhythm section for her shows. A bandleader might use participation in jam sessions as a way to scout out new talent for her big band. In jazz, jam sessions are also an opportunity for informal learning, as players can show other performers new playing techniques or improvisation approaches. The hospitality of the landlord or venue owner can also be important to the music session scene. Sometimes he or she might offer a round of drinks or tea, coffee and food to the performers, to thank them for their contribution to the entertainment of the audience. Paid concerts As part of jazz festivals, the organizers sometimes arrange what are termed "jam sessions", which are concerts in